Optical imaging system

ABSTRACT

An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, wherein the optical imaging system satisfies 1&lt;|f134567−f|/f, where f134567 is a composite focal length of the first to seventh lenses calculated with an index of refraction of the second lens set to 1.0, f is an overall focal length of the optical imaging system, and f134567 and f are expressed in a same unit of measurement.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 17/088,675 filed on Nov. 4, 2020, which is a continuation of U.S. patent application Ser. No. 16/424,774 filed on May 29, 2019, now U.S. Pat. No. 11,353,686 issued on Jun. 7, 2022, which claims the benefit under 35 USC 119(a) of Korean Patent Application Nos. 10-2018-0061393 filed on May 29, 2018, and 10-2018-0106185 filed on Sep. 5, 2018, in the Korean Intellectual Property Office, the entire disclosures of which are incorporated herein by reference for all purposes.

BACKGROUND 1. Field

This application relates to an optical imaging system including seven lenses.

2. Description of Related Art

A mobile terminal is commonly provided with a camera for video communications or capturing images. However, it is difficult to achieve high performance in such a camera for a mobile terminal due to space limitations inside the mobile terminal.

Accordingly, a demand for an optical imaging system capable of improving the performance of the camera without increasing a size of the camera has increased as a number of mobile terminals provided with a camera has increased.

SUMMARY

This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In one general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, wherein the optical imaging system satisfies 1<|f134567−f|/f, where f134567 is a composite focal length of the first to seventh lenses calculated with an index of refraction of the second lens set to 1.0, f is an overall focal length of the optical imaging system, and f134567 and f are expressed in a same unit of measurement.

An object-side surface of the first lens may be convex.

An image-side surface of the seventh lens may be concave.

At least one inflection point may be formed on either one or both of an object-side surface and an image-side surface of the sixth lens.

At least one inflection point may be formed on either one or both of an object-side surface and an image-side surface of the seventh lens.

A distance along the optical axis from an object-side surface of the first lens to the imaging plane may be 6.0 mm or less.

An F No. of the optical imaging system may be less than 1.7.

An object-side surface of the second lens may be convex.

An image-side surface of the third lens may be concave.

An object-side surface or an image-side surface of the fourth lens may be concave.

An image-side surface of the fifth lens may be concave.

Either one or both of an object-side surface and an image-side surface of the sixth lens may be convex.

The optical imaging system may further satisfy 0.1<L1w/L7w<0.3, where L1w is a weight of the first lens, L7w is a weight of the seventh lens, and L1w and L7w are expressed in a same unit of measurement.

The optical imaging system may further include a spacer disposed between the sixth and seventh lenses, and the optical imaging system may further satisfy 0.5<S6d/f<1.2, where S6d is an inner diameter of the spacer, f is the overall focal length of the optical imaging system, and S6d and f are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.4<L1TR/L7TR<0.7, where L1TR is an overall outer diameter of the first lens, L7TR is an overall outer diameter of the seventh lens, and L1TR and L7TR are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.5<L1234TRavg/L7TR<0.75, where L1234TRavg is an average value of overall outer diameters of the first to fourth lenses, L7TR is an overall diameter of the seventh lens, and L1234TRavg and L7TR are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.5<L12345TRavg/L7TR<0.76, where L12345TRavg is an average value of overall outer diameters of the first to fifth lenses, L7TR is an overall outer diameter of the seventh lens, and L12345TRavg and L7TR are expressed in a same unit of measurement.

The second lens may have a positive refractive power.

The third lens may have a positive refractive power.

A paraxial region of an object-side surface of the seventh lens may be concave.

Other features and aspects will be apparent from the following detailed description, the drawings, and the claims.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a view illustrating a first example of an optical imaging system.

FIG. 2 illustrates aberration curves of the optical imaging system of FIG. 1 .

FIG. 3 is a view illustrating a second example of an optical imaging system.

FIG. 4 illustrates aberration curves of the optical imaging system of FIG. 3 .

FIG. 5 is a view illustrating a third example of an optical imaging system.

FIG. 6 illustrates aberration curves of the optical imaging system of FIG. 5 .

FIG. 7 is a view illustrating a fourth example of an optical imaging system.

FIG. 8 illustrates aberration curves of the optical imaging system of FIG. 7 .

FIG. 9 is a view illustrating a fifth example of an optical imaging system.

FIG. 10 illustrates aberration curves of the optical imaging system of FIG. 9 .

FIG. 11 is a view illustrating a sixth example of an optical imaging system.

FIG. 12 illustrates aberration curves of the optical imaging system of FIG. 11 .

FIG. 13 is a view illustrating a seventh example of an optical imaging system.

FIG. 14 illustrates aberration curves of the optical imaging system of FIG. 13 .

FIG. 15 is a view illustrating an eighth example of an optical imaging system.

FIG. 16 illustrates aberration curves of the optical imaging system of FIG. 15 .

FIG. 17 is a view illustrating a ninth example of an optical imaging system.

FIG. 18 illustrates aberration curves of the optical imaging system of FIG. 17 .

FIG. 19 is a view illustrating a tenth example of an optical imaging system.

FIG. 20 illustrates aberration curves of the optical imaging system of FIG. 19 .

FIG. 21 is a view illustrating an eleventh example of an optical imaging system.

FIG. 22 illustrates aberration curves of the optical imaging system of FIG. 21 .

FIG. 23 is a view illustrating a twelfth example of an optical imaging system.

FIG. 24 illustrates aberration curves of the optical imaging system of FIG. 23 .

FIG. 25 is a view illustrating a thirteenth example of an optical imaging system.

FIG. 26 illustrates aberration curves of the optical imaging system of FIG. 25 .

FIG. 27 is a view illustrating a fourteenth example of an optical imaging system.

FIG. 28 illustrates aberration curves of the optical imaging system of FIG. 27 .

FIG. 29 is a view illustrating a fifteenth example of an optical imaging system.

FIG. 30 illustrates aberration curves of the optical imaging system of FIG. 29 .

FIG. 31 is a view illustrating a sixteenth example of an optical imaging system.

FIG. 32 illustrates aberration curves of the optical imaging system of FIG. 31 .

FIG. 33 is a view illustrating a seventeenth example of an optical imaging system.

FIG. 34 illustrates aberration curves of the optical imaging system of FIG. 33 .

FIG. 35 is a view illustrating an eighteenth example of an optical imaging system.

FIG. 36 illustrates aberration curves of the optical imaging system of FIG. 35 .

FIG. 37 is a view illustrating a nineteenth example of an optical imaging system.

FIG. 38 illustrates aberration curves of the optical imaging system of FIG. 37 .

FIG. 39 is a view illustrating a twentieth example of an optical imaging system.

FIG. 40 illustrates aberration curves of the optical imaging system of FIG. 39 .

FIG. 41 is a view illustrating a twenty-first example of an optical imaging system.

FIG. 42 illustrates aberration curves of the optical imaging system of FIG. 41 .

FIG. 43 is a view illustrating a twenty-second example of an optical imaging system.

FIG. 44 illustrates aberration curves of the optical imaging system of FIG. 43 .

FIG. 45 is a view illustrating a twenty-third example of an optical imaging system.

FIG. 46 illustrates aberration curves of the optical imaging system of FIG. 45 .

FIG. 47 is a view illustrating a twenty-fourth example of an optical imaging system.

FIG. 48 illustrates aberration curves of the optical imaging system of FIG. 47 .

FIG. 49 is a view illustrating a twenty-fifth example of an optical imaging system.

FIG. 50 illustrates aberration curves of the optical imaging system of FIG. 49 .

FIG. 51 is a view illustrating a twenty-sixth example of an optical imaging system.

FIG. 52 illustrates aberration curves of the optical imaging system of FIG. 51 .

FIG. 53 is a view illustrating a twenty-seventh example of an optical imaging system.

FIG. 54 illustrates aberration curves of the optical imaging system of FIG. 53 .

FIG. 55 is a view illustrating a twenty-eighth example of an optical imaging system.

FIG. 56 illustrates aberration curves of the optical imaging system of FIG. 55 .

FIGS. 57 and 58 are cross-sectional views illustrating examples of an optical imaging system and a lens barrel coupled to each other.

FIG. 59 is a cross-sectional view illustrating an example of a seventh lens.

FIG. 60 is a cross-sectional view illustrating an example of a shape of a rib of a lens.

Throughout the drawings and the detailed description, the same reference numerals refer to the same elements. The drawings may not be to scale, and the relative size, proportions, and depiction of elements in the drawings may be exaggerated for clarity, illustration, and convenience.

DETAILED DESCRIPTION

The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatuses, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the disclosure of this application. For example, the sequences of operations described herein are merely examples, and are not limited to those set forth herein, but may be changed as will be apparent after an understanding of the disclosure of this application, with the exception of operations necessarily occurring in a certain order. Also, descriptions of features that are known in the art may be omitted for increased clarity and conciseness.

The features described herein may be embodied in different forms, and are not to be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways of implementing the methods, apparatuses, and/or systems described herein that will be apparent after an understanding of the disclosure of this application.

Throughout the specification, when an element, such as a layer, region, or substrate, is described as being “on,” “connected to,” or “coupled to” another element, it may be directly “on,” “connected to,” or “coupled to” the other element, or there may be one or more other elements intervening therebetween. In contrast, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there can be no other elements intervening therebetween.

As used herein, the term “and/or” includes any one and any combination of any two or more of the associated listed items.

Although terms such as “first,” “second,” and “third” may be used herein to describe various members, components, regions, layers, or sections, these members, components, regions, layers, or sections are not to be limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or section from another member, component, region, layer, or section. Thus, a first member, component, region, layer, or section referred to in examples described herein may also be referred to as a second member, component, region, layer, or section without departing from the teachings of the examples.

Spatially relative terms such as “above,” “upper,” “below,” and “lower” may be used herein for ease of description to describe one element's relationship to another element as shown in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as being “above” or “upper” relative to another element will then be “below” or “lower” relative to the other element. Thus, the term “above” encompasses both the above and below orientations depending on the spatial orientation of the device. The device may also be oriented in other ways (for example, rotated by 90 degrees or at other orientations), and the spatially relative terms used herein are to be interpreted accordingly.

The terminology used herein is for describing various examples only, and is not to be used to limit the disclosure. The articles “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “includes,” and “has” specify the presence of stated features, numbers, operations, members, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, members, elements, and/or combinations thereof.

Thicknesses, sizes, and shapes of lenses illustrated in the drawings may have been slightly exaggerated for convenience of explanation. In addition, the shapes of spherical surfaces or aspherical surfaces of the lenses described in the detailed description and illustrated in the drawings are merely examples. That is, the shapes of the spherical surfaces or the aspherical surfaces of the lenses are not limited to the examples described herein.

Numerical values of radii of curvature of lenses, thicknesses of lenses, distances between elements including lenses or surfaces, effective aperture radii of lenses, focal lengths, and diameters, thicknesses, and lengths of various elements are expressed in millimeters (mm), and angles are expressed in degrees. Thicknesses of lenses and distances between elements including lenses or surfaces are measured along the optical axis of the optical imaging system.

The term “effective aperture radius” as used in this application refers to a radius of a portion of a surface of a lens or other element (an object-side surface or an image-side surface of a lens or other element) through which light actually passes. The effective aperture radius is equal to a distance measured perpendicular to an optical axis of the surface between the optical axis of the surface and the outermost point on the surface through which light actually passes. Therefore, the effective aperture radius may be equal to a radius of an optical portion of a surface, or may be smaller than the radius of the optical portion of the surface if light does not pass through a peripheral portion of the optical portion of the surface. The object-side surface and the image-side surface of a lens or other element may have different effective aperture radii.

In this application, unless stated otherwise, a reference to the shape of a lens surface means the shape of a paraxial region of the lens surface. A paraxial region of a lens surface is a central portion of the lens surface surrounding the optical axis of the lens surface in which light rays incident to the lens surface make a small angle θ to the optical axis and the approximations sin θ≈θ, tan θ≈θ, and cos θ≈1 are valid.

For example, a statement that the object-side surface of a lens is convex means that at least a paraxial region of the object-side surface of the lens is convex, and a statement that the image-side surface of the lens is concave means that at least a paraxial region of the image-side surface of the lens is concave. Therefore, even though the object-side surface of the lens may be described as convex, the entire object-side surface of the lens may not be convex, and a peripheral region of the object-side surface of the lens may be concave. Also, even though the image-side surface of the lens may be described as concave, the entire image-side surface of the lens may not be concave, and a peripheral region of the image-side surface of the lens may be convex.

An optical imaging system includes a plurality of lenses. For example, the optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system. Thus, the first lens is a lens closest to an object (or a subject) to be imaged by the optical imaging system, while the seventh lens is a lens closest to the imaging plane.

Each lens of the optical imaging system includes an optical portion and a rib. The optical portion of the lens is a portion of the lens that is configured to refract light, and is generally formed in a central portion of the lens. The rib of the lens is an edge portion of the lens that enables the lens to be mounted in a lens barrel and the optical axis of the lens to be aligned with the optical axis of the optical imaging system. The rib of the lens extends radially outward from the optical portion. The optical portions of the lenses are generally not in contact with each other. For example, the first to seventh lenses are mounted in the lens barrel so that they are spaced apart from one other by predetermined distances along the optical axis of the optical imaging system. The ribs of the lenses may be selectively in contact with each other. For example, the ribs of the first to fourth lenses, or the first to fifth lenses, or the second to fourth lenses, may be in contact with each other so that the optical axes of these lenses may be easily aligned with the optical axis of the optical imaging system.

Next, a configuration of the optical imaging system will be described.

The optical imaging system includes a plurality of lenses. For example, the optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system.

The optical imaging system further includes an image sensor and a filter. The image sensor forms an imaging plane and converts light refracted by the first to seventh lenses into an electrical signal. The filter is disposed between the seventh lens and the imaging plane, and blocks infrared rays in the light refracted by the first to seventh lenses from being incident on the imaging plane.

The optical imaging system further includes a stop and spacers. The stop may be disposed in front of the first lens, or at a position of either an object-side surface or an image side-surface of one of the first to seventh lenses, or between two adjacent lenses of the first to seventh lenses, or between the object-side surface and the image-side surface of one of the first to seventh lenses, to adjust an amount of light incident on the imaging plane. Some examples may include two stops, one of which may be disposed in front of the first lens, or at the position of the object-side surface of the first lens, or between the object-side surface and the image-side surface of the first lens. Each of the spacers is disposed at a respective position between two lenses of the first to seventh lenses to maintain a predetermined distance between the two lenses. In addition, the spacers may be formed of a light-shielding material to block extraneous light from penetrating into the ribs of the lenses. There may be six or seven spacers. For example, a first spacer is disposed between the first lens and the second lens, a second spacer is disposed between the second lens and the third lens, a third spacer is disposed between the third lens and the fourth lens, a fourth spacer is disposed between the fourth lens and the fifth lens, a fifth spacer is disposed between the fifth lens and the sixth lens, and a sixth spacer is disposed between the sixth lens and the seventh lens. In addition, the optical imaging system may further include a seventh spacer disposed between the sixth lens and the sixth spacer.

Next, the lenses of the optical imaging system will be described.

The first lens has a refractive power. For example, the first lens has a positive refractive power or a negative refractive power. One surface of the first lens may be convex. For example, an object-side surface of the first lens may be convex. The first lens may include an aspherical surface. For example, one surface or both surfaces of the first lens may be aspherical.

The second lens has a refractive power. For example, the second lens has a positive refractive power or a negative refractive power. One surface or both surfaces of the second lens may be convex. For example, an object-side surface or both an object-side surface and an image-side surface of the second lens may be convex. The second lens may include an aspherical surface. For example, one surface or both surfaces of the second lens may be aspherical.

The third lens has a refractive power. For example, the third lens has a positive refractive power or a negative refractive power. One surface or both surfaces of the third lens may be convex. For example, an object-side surface, or an image-side surface, or both an object-side surface and an image-side surface of the third lens may be convex. The third lens may include an aspherical surface. For example, one surface or both surfaces of the third lens may be aspherical.

The fourth lens has a refractive power. For example, the fourth lens has a positive refractive power or a negative refractive power. One surface or both surfaces of the fourth lens may be convex. For example, an object-side surface, or an image-side surface, or both an object-side surface and an image-side surface of the fourth lens may be convex. The fourth lens may include an aspherical surface. For example, one surface or both surfaces of the fourth lens may be aspherical.

The fifth lens has a refractive power. For example, the fifth lens has a positive refractive power or a negative refractive power. One surface of the fifth lens may be convex. For example, an object-side surface or an image-side surface of the fifth lens may be convex. The fifth lens may include an aspherical surface. For example, one surface or both surfaces of the fifth lens may be aspherical.

The sixth lens has a refractive power. For example, the sixth lens has a positive refractive power or a negative refractive power. In some examples, one surface or both surfaces of the sixth lens may be convex. For example, an object-side surface or both an object-side surface and an image-side surface of the sixth lens may be convex. Also, in some examples, one surface or both surfaces of the sixth lens may be concave. For example, an image-side surface or both an object-side surface and an image-side surface of the sixth lens may be concave. At least one surface of the sixth lens may have at least one inflection point. An inflection point is a point where a lens surface changes from convex to concave, or from concave to convex. A number of inflection points is counted from a center of the lens to an outer edge of the optical portion of the lens. For example, at least one inflection point may be formed on either one or both of the object-side surface and the image-side surface of the sixth lens. Therefore, at least one surface of the sixth lens may have a paraxial region and a peripheral region having shapes that are different from each other. For example, a paraxial region of the image-side surface of the sixth lens may be concave, but a peripheral region thereof may be convex. The sixth lens may have an aspherical surface. For example, one surface or both surfaces of the sixth lens may be aspherical.

The seventh lens has a refractive power. For example, the seventh lens has a positive refractive power or a negative refractive power. One surface of the seventh lens may be concave. For example, an image-side surface or both an object-side surface and an image-side surface of the seventh lens may be concave. At least one surface of the seventh lens may have at least one inflection point. For example, at least one inflection point may be formed on either one or both of the object-side surface and the image-side surface of the seventh lens. Therefore, at least one surface of the seventh lens may have a paraxial region and a peripheral region having shapes that are different from each other. For example, a paraxial region of the image-side surface of the seventh lens may be concave, but a peripheral region thereof may be convex. The seventh lens may include an aspherical surface. For example, one surface or both surfaces of the seventh lens may be aspherical.

The lenses of the optical imaging system may be made of a light material having a high light transmittance. For example, the first to seventh lenses may be made of a plastic material. However, a material of the first to seventh lenses is not limited to the plastic material.

The aspherical surfaces of the first to seventh lenses may be represented by the following Equation 1:

$\begin{matrix} {Z = {\frac{{cY}^{2}}{1 + \sqrt{1 - {\left( {1 + K} \right)c^{2}Y^{2}}}} + {AY}^{2} + {BY}^{2} + {CY}^{8} + {DY}^{10} + {EY}^{12} + {FY}^{14} + {GY}^{16} + {HY}^{18} + \ldots}} & (1) \end{matrix}$

In Equation 1, c is a curvature of a lens surface and is equal to an inverse of a radius of curvature of the lens surface at an optical axis of the lens surface, K is a conic constant, Y is a distance from a certain point on an aspherical surface of the lens to an optical axis of the lens in a direction perpendicular to the optical axis, A to H are aspherical constants, and Z (or sag) is a distance between the certain point on the aspherical surface of the lens at the distance Y to the optical axis and a tangential plane perpendicular to the optical axis meeting the apex of the aspherical surface of the lens. Some of the examples disclosed in this application include an aspherical constant J. An additional term of JY²⁰ may be added to the right side of Equation 1 to reflect the effect of the aspherical constant J.

The optical imaging system may satisfy one or more of the following Conditional Expressions 1 to 6:

0.1<L1w/L7w<0.4  (Conditional Expression 1)

0.5<S6d/f<1.4  (Conditional Expression 2)

0.4<L1TR/L7TR<0.8  (Conditional Expression 3)

0.5<L1234TRavg/L7TR<0.9  (Conditional Expression 4)

0.5<L12345TRavg/L7TR<0.9  (Conditional Expression 5)

1<|f134567−f|/f  (Conditional Expression 6)

In the above Conditional Expressions, L1w is a weight of the first lens, and L7w is a weight of the seventh lens.

S6d is an inner diameter of the sixth spacer, and f is an overall focal length of the optical imaging system.

L1TR is an overall outer diameter of the first lens, and L7TR is an overall outer diameter of the seventh lens. The overall outer diameter of a lens is a diameter of the lens including both the optical portion of the lens and the rib of the lens.

L1234TRavg is an average value of overall outer diameters of the first to fourth lenses, and L12345TRavg is an average value of overall outer diameters of the first to fifth lenses.

f134567 is a composite focal length of the first to seventh lenses calculated with an index of refraction of the second lens set to 1.0, which is substantially equal to an index of refraction of air. When the index of refraction of the second lens is set to 1.0, the second lens does not refract light. Thus, by comparing f134567 with f, which is the overall focal length of the optical system, it is possible to evaluate the effect of the second lens on f. For example, the second lens may shorten f, or lengthen f, or have no effect on f In other words, f134567 may be greater than f, or less than f, or equal to f.

Conditional Expressions 1 and 3 specify ranges of a weight ratio and an overall outer diameter ratio between the first lens and the seventh lens to facilitate a self-alignment between the lenses and an alignment by a lens barrel.

Conditional Expression 2 specifies a range of a ratio of the inner diameter of the sixth spacer to the overall focal length of the optical imaging system for minimizing a flare phenomenon.

Conditional Expressions 4 and 5 specify overall outer diameter ratios between the lenses to facilitate aberration correction.

Conditional Expression 6 specifies a lower limit of a degree of shortening of f, which is the overall focal length of the optical imaging system, by the second lens. The lower limit of 1 for |f134567−f|/f in Conditional Expression 6 corresponds to an example in which the second lens shortens f to 50% of f134567. Thus, Conditional Expression 6 covers examples in which f is 50% or less of f134567.

The optical imaging system may also satisfy one or more of the following Conditional Expressions 7 to 12:

0.1<L1w/L7w<0.3  (Conditional Expression 7)

0.5<S6d/f<1.2  (Conditional Expression 8)

0.4<L1TR/L7TR<0.7  (Conditional Expression 9)

0.5<L1234TRavg/L7TR<0.75  (Conditional Expression 10)

0.5<L12345TRavg/L7TR<0.76  (Conditional Expression 11)

1<|f134567−f|/f<100  (Conditional Expression 12)

Conditional Expressions 7 to 12 are the same as Conditional Expressions 1 to 6, except that Conditional Expressions 7 to 12 specify narrower ranges.

The optical imaging system may also satisfy one or more of the following Conditional Expressions 13 to 33:

0.01<R1/R4<1.3  (Conditional Expression 13)

0.1<R1/R5<0.7  (Conditional Expression 14)

0.05<R1/R6<0.9  (Conditional Expression 15)

0.2<R1/R11<1.2  (Conditional Expression 16)

0.8<R1/R14<1.2  (Conditional Expression 17)

0.6<(R11+R14)/(2*R1)<3.0  (Conditional Expression 18)

0.4<D13/D57<1.2  (Conditional Expression 19)

0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*f<0.8  (Conditional Expression 20)

0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*TTL<1.0  (Conditional Expression 21)

0.2<TD1/D67<0.8  (Conditional Expression 22)

0.1<(R11+R14)/(R5+R6)<1.0  (Conditional Expression 23)

SD12<SD34  (Conditional Expression 24)

SD56<SD67  (Conditional Expression 25)

SD56<SD34  (Conditional Expression 26)

0.6<TTL/(2*(IMG HT))<0.9  (Conditional Expression 27)

0.2<ΣSD/ΣTD<0.7  (Conditional Expression 28)

0<min(f1:f3)/max(f4:f7)<0.4  (Conditional Expression 29)

0.4<(ΣTD)/TTL<0.7  (Conditional Expression 30)

0.7<SL/TTL<1.0  (Conditional Expression 31)

0.81<f12/f123<0.96  (Conditional Expression 32)

0.6<f12/f1234<0.84  (Conditional Expression 33)

In the above Conditional Expressions, R1 is a radius of curvature of an object-side surface of the first lens, R4 is a radius of curvature of an image-side surface of the second lens, R5 is a radius of curvature of an object-side surface of the third lens, R6 is a radius of curvature of an image-side surface of the third lens, R11 is a radius of curvature of an object-side surface of the sixth lens, and R14 is a radius of curvature of an image-side surface of the seventh lens.

D13 is a distance along an optical axis of the optical imaging system from the object-side surface of the first lens to the image-side surface of the third lens, and D57 is a distance along the optical axis from an object-side surface of the fifth lens to the image-side surface of the seventh lens.

f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, f is an overall focal length of the optical imaging system, and TTL is a distance along the optical axis from the object-side surface of the first lens to an imaging plane of an image sensor of the optical imaging system.

TD1 is a thickness along the optical axis of the first lens, and D67 is a distance along the optical axis from the object-side surface of the sixth lens to the image-side surface of the seventh lens.

SD12 is a distance along the optical axis from an image-side surface of the first lens to an object-side surface of the second lens, SD34 is a distance along the optical axis from the image-side surface of the third lens to an object-side surface of the fourth lens, SD56 is a distance along the optical axis from an image-side surface of the fifth lens to the object-side surface of the sixth lens, and SD67 is a distance along the optical axis from an image-side surface of the sixth lens to an object-side surface of the seventh lens.

IMG HT is one-half of a diagonal length of the imaging plane of the image sensor.

ΣSD is a sum of air gaps along the optical axis between the lenses, and ΣTD is a sum of thicknesses along the optical axis of the lenses. An air gap is a distance along the optical axis between adjacent lenses.

min(f1:f3) is a minimum value of absolute values of the focal lengths of the first to third lenses, and max(f4:f7) is a maximum value of absolute values of the focal lengths of the fourth to seventh lenses.

SL is a distance along the optical axis from a stop to the imaging plane of the image sensor.

f12 is a composite focal length of the first and second lenses, f123 is a composite focal length of the first to third lenses, and f1234 is a composite focal length of the first to fourth lenses.

Conditional Expression 13 specifies a design range of the second lens for minimizing aberration caused by the first lens. For example, it is difficult to expect a sufficient correction of longitudinal spherical aberration for the second lens having a radius of curvature that exceeds the upper limit value of Conditional Expression 13, and it is difficult to expect a sufficient correction of astigmatic field curves for the second lens having a radius of curvature that is below the lower limit value of Conditional Expression 13.

Conditional Expressions 14 and 15 specify a design range of the third lens for minimizing aberration caused by the first lens. For example, it is difficult to expect a sufficient correction of longitudinal spherical aberration for the third lens having a radius of curvature that exceeds the upper limit value of Conditional Expression 14 or 15, and it is difficult to expect a correction of astigmatic field curves for the third lens having a radius of curvature that is below the lower limit value of Conditional Expression 14 or 15.

Conditional Expression 16 specifies a design range of the sixth lens for minimizing aberration caused by the first lens. For example, it is difficult to expect a sufficient correction of longitudinal spherical aberration for the sixth lens having a radius of curvature that exceeds the upper limit value of Conditional Expression 16, and the sixth lens having a radius of curvature that is below the lower limit value of Conditional Expression 16 is apt to cause a flare phenomenon.

Conditional Expression 17 specifies a design range of the seventh lens for minimizing aberration caused by the first lens. For example, it is difficult to expect a sufficient correction of longitudinal spherical aberration for the seventh lens having a radius of curvature that exceeds the upper limit value of Conditional Expression 17, and the seventh lens having a radius of curvature that is below the lower limit value of Conditional Expression 17 tends to cause a curvature of the imaging plane.

Conditional Expression 18 specifies a ratio of a sum of radii of curvature of the sixth lens and the seventh lens to twice a radius of curvature of the first lens for correcting the longitudinal spherical aberration and achieving excellent optical performance.

Conditional Expression 19 specifies a ratio of an optical imaging system mountable in a small terminal. For example, an optical imaging system having a ratio that exceeds the upper limit value of Conditional Expression 19 may cause a problem that the total length of the optical imaging system becomes long, and an optical imaging system having a ratio that is below the lower limit value of Conditional Expression 19 may cause a problem that a size of a lateral cross-section of the optical imaging system becomes large.

Conditional Expressions 20 and 21 specify a refractive power ratio of the first to seventh lenses for facilitating mass production of the optical imaging system. For example, an optical imaging system that exceeds the upper limit value of Conditional Expression 20 or 21 or is below the lower limit value of Conditional Expression 20 or 21 is difficult to commercialize because the refractive power of one or more of the first to seventh lenses is too great.

Conditional Expression 22 specifies a thickness range of the first lens for implementing a compact optical imaging system. For example, the first lens having a thickness that exceeds the upper limit value of Conditional Expression 22 or is below the lower limit value of Conditional Expression 22 is too thick or too thin to be manufactured.

Conditional Expression 24 specifies a design condition of the first to fourth lenses for improving chromatic aberration. For example, a case in which a distance between the first lens and the second lens is shorter than a distance between the third lens and the fourth lens is advantageous for improving the chromatic aberration.

Conditional Expressions 27 to 30 specify design conditions for implementing a compact optical imaging system. For example, lenses that deviate from the numerical range of Conditional Expression 28 or 30 are difficult to form by injection molding and process.

Conditional Expressions 31 to 33 specify design conditions of an optical imaging system in consideration of a position of the stop. For example, an optical imaging system that does not satisfy one or more of Conditional Expressions 31 to 33 may have a longer overall length due to the refractive power of the lenses disposed behind the stop.

Next, various examples of the optical imaging system will be described. In the tables that appear in the following examples, S1 denotes an object-side surface of the first lens, S2 denotes an image-side surface of the first lens, S3 denotes an object-side surface of the second lens, S4 denotes an image-side surface of the second lens, S5 denotes an object-side surface of the third lens, S6 denotes an image-side surface of the third lens, S7 denotes an object-side surface of the fourth lens, S8 denotes an image-side surface of the fourth lens, S9 denotes an object-side surface of the fifth lens, S10 denotes an image-side surface of the fifth lens, S11 denotes an object-side surface of the sixth lens, S12 denotes an image-side surface of the sixth lens, S13 denotes an object-side surface of the seventh lens, S14 denotes an image-side surface of the seventh lens, S15 denotes an object-side surface of the filter, S16 denotes an image-side surface of the filter, and S17 denotes the imaging plane.

First Example

FIG. 1 is a view illustrating a first example of an optical imaging system, and FIG. 2 illustrates aberration curves of the optical imaging system of FIG. 1 .

An optical imaging system 1 includes a first lens 1001, a second lens 2001, a third lens 3001, a fourth lens 4001, a fifth lens 5001, a sixth lens 6001, and a seventh lens 7001.

The first lens 1001 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2001 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3001 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. The fourth lens 4001 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5001 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6001 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6001. The seventh lens 7001 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7001.

The optical imaging system 1 further includes a stop, a filter 8001, and an image sensor 9001. The stop is disposed between the first lens 1001 and the second lens 2001 to adjust an amount of light incident on the image sensor 9001. The filter 8001 is disposed between the seventh lens 7001 and the image sensor 9001 to block infrared rays. The image sensor 9001 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 1 , the stop is disposed at a distance of 0.9035 mm from the object-side surface of the first lens 1001 toward the imaging plane of the optical imaging system 1. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 1 listed in Table 57 that appears later in this application.

Table 1 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 1 , and Table 2 below shows aspherical surface coefficients of the lenses of FIG. 1 .

TABLE 1 Surface Radius of Thickness/ Index of Abbe Effective Aperture No. Element Curvature Distance Refraction Number Radius S1 First 2.0536 0.9035 1.546 56.114 1.568 S2 Lens 8.6990 0.1210 1.513 (Stop) S3 Second 5.7984 0.2300 1.669 20.353 1.411 S4 Lens 3.2822 0.3720 1.251 S5 Third 18.2423 0.5020 1.546 56.114 1.280 S6 Lens −30.8318 0.1292 1.403 S7 Fourth 9.4556 0.2600 1.669 20.353 1.421 S8 Lens 6.8529 0.2842 1.592 S9 Fifth 114.7177 0.3399 1.669 20.353 1.703 S10 Lens 7.7503 0.2357 1.957 S11 Sixth 3.8296 0.8015 1.546 56.114 2.275 S12 Lens −2.3157 0.5095 2.531 S13 Seventh −2.7231 0.3800 1.546 56.114 3.250 S14 Lens 2.7638 0.1236 3.501 S15 Filter Infinity 0.1100 1.519 64.197 3.788 S16 Infinity 0.6860 3.823 S17 Imaging Infinity 0.0120 4.187 Plane

TABLE 2 K A B C D E F G H J S1 −1.0628 0.0139 0.0094 −0.0141 0.0168 −0.0121 0.0052 −0.0012 0.0001 0 S2 10.994 −0.0496 0.0432 −0.0268 0.0108 −0.0042 0.0015 −0.0004  3E−05 0 S3 0 0 0 0 0 0 0 0 0 0 S4 −1.5785 −0.0696 0.0645 0.0114 −0.0726 0.0789 −0.0411 0.0103 −0.0006 0 S5 0 −0.025 0.0128 −0.0683 0.1144 −0.1136 0.0622 −0.0169 0.0018 0 S6 −95 −0.0612 −0.0021 0.0182 −0.0574 0.0781 −0.0583 0.0229 −0.0037 0 S7 0 −0.1305 0.0429 −0.1213 0.1851 −0.1579 0.0797 −0.0225 0.0028 0 S8 0 −0.1024 0.076 −0.1473 0.1804 −0.1345 0.0601 −0.015 0.0016 0 S9 0 −0.1299 0.161 −0.1553 0.1065 −0.0538 0.0179 −0.0035 0.0003 0 S10 3.6183 −0.1952 0.1484 −0.1106 0.0696 −0.0319 0.0091 −0.0014  9E−05 0 S11 −19.534 −0.0262 −0.0142 0.0017 0.002 −0.0013 0.0003 −3E−05  6E−07 0 S12 −0.7774 0.0934 −0.0701 0.0245 −0.0058 0.0012 0.0002  2E−05 −7E−07 0 S13 −17.906 −0.104 0.0087 0.0102 −0.0036 0.0006 −5E−05  2E−06 −4E−08 0 S14 −0.5975 −0.11 0.0366 −0.009 0.0016 −0.0002  2E−05 −2E−06  6E−08 −1.12E−09

Second Example

FIG. 3 is a view illustrating a second example of an optical imaging system, and FIG. 4 illustrates aberration curves of the optical imaging system of FIG. 3 .

An optical imaging system 2 includes a first lens 1002, a second lens 2002, a third lens 3002, a fourth lens 4002, a fifth lens 5002, a sixth lens 6002, and a seventh lens 7002.

The first lens 1002 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2002 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. The third lens 3002 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4002 has a positive refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The fifth lens 5002 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6002 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6002. The seventh lens 7002 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7002, and one inflection point is formed on the image-side surface of the seventh lens 7002.

The optical imaging system 2 further includes a stop, a filter 8002, and an image sensor 9002. The stop is disposed between the second lens 2002 and the third lens 3002 to adjust an amount of light incident on the image sensor 9002. The filter 8002 is disposed between the seventh lens 7002 and the image sensor 9002 to block infrared rays. The image sensor 9002 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 3 , the stop is disposed at distance of 1.2514 mm from the object-side surface of the first lens 1002 toward the imaging plane of the optical imaging system 2. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 2 listed in Table 57 that appears later in this application.

Table 3 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 3 , and Table 4 below shows aspherical surface coefficients of the lenses of FIG. 3 .

TABLE 3 Surface Radius of Thickness/ Index of Abbe Effective Aperture No. Element Curvature Distance Refraction Number Radius S1 First 2.0977 0.4848 1.546 56.114 1.410 S2 Lens 3.2123 0.1235 1.350 S3 Second 2.8957 0.6231 1.546 56.114 1.310 S4 Lens −16.0261 0.0200 1.271 S5 (Stop) 4.6472 0.2000 1.679 19.236 1.157 S6 Third 2.3076 0.6031 1.095 Lens S7 Fourth −1200.00 0.2984 1.679 19.236 1.270 S8 Lens −1200.00 0.2107 1.456 S9 Fifth 3.3656 0.3072 1.546 56.114 1.712 S10 Lens 3.2933 0.2365 2.000 S11 Sixth 3.2587 0.3776 1.679 19.236 2.150 S12 Lens 2.6817 0.1409 2.500 S13 Seventh 1.5589 0.5411 1.537 53.955 2.871 S14 Lens 1.3718 0.2430 3.050 S15 Filter Infinity 0.1100 1.519 64.166 3.347 S16 Infinity 0.6673 3.379 S17 Imaging Infinity 0.0026 3.708 Plane

TABLE 4 K A B C D E F G H J S1 −7.583 0.0707 −0.0815 0.0542 −0.0479 0.0209 −0.0011 −0.0013 0.0002 0 S2 −20.327 −0.0052 −0.1116 0.0603 0.0221 −0.0313 0.0098 −0.0002 −0.0003 0 S3 −0.2671 −0.0365 −0.0311 −0.0159 0.08 −0.0164 −0.04 0.0265 −0.0051 0 S4 0 0.0221 −0.096 0.0722 0.0909 −0.2138 0.1659 −0.0596 0.0083 0 S5 −4.5253 −0.0697 0.0432 −0.146 0.4306 −0.6073 0.4481 −0.1664 0.0247 0 S6 0.5431 −0.098 0.1133 −0.1737 0.2753 −0.3038 0.2109 −0.0818 0.0149 0 S7 0 −0.0194 −0.0742 0.1045 −0.1099 0.1045 −0.0888 0.0459 −0.0098 0 S8 0 −0.0129 −0.0975 0.0464 0.0472 −0.0702 0.033 −0.0054 0 0 S9 −43.017 0.1335 −0.1604 0.0703 −0.0277 0.0168 −0.01 0.003 −0.0003 0 S10 −5.2037 −0.0285 0.0684 −0.1295 0.1018 −0.0463 0.0125 −0.0018 0.0001 0 S11 −1.699 0.0274 −0.1873 0.1887 −0.126 0.0512 −0.0118 0.0014 −7E−05 0 S12 −0.0013 −0.0788 −0.0314 0.0355 −0.0206 0.0072 −0.0014 0.0001 −6E−06 0 S13 −0.8015 −0.4138 0.198 −0.0635 0.0157 −0.003 0.0004 −4E−05  2E−06 −5E−08 S14 −1.2781 −0.3 0.1664 −0.0696 0.021 −0.0044 0.0006 −5E−05  3E−06 −5E−08

Third Example

FIG. 5 is a view illustrating a third example of an optical imaging system, and FIG. 6 illustrates aberration curves of the optical imaging system of FIG. 5 .

An optical imaging system 3 includes a first lens 1003, a second lens 2003, a third lens 3003, a fourth lens 4003, a fifth lens 5003, a sixth lens 6003, and a seventh lens 7003.

The first lens 1003 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2003 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. The third lens 3003 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4003 has a positive refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The fifth lens 5003 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6003 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6003. The seventh lens 7003 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7003, and one inflection point is formed on the image-side surface of the seventh lens 7003.

The optical imaging system 3 further includes a stop, a filter 8003, and an image sensor 9003. The stop is disposed between the second lens 2003 and the third lens 3003 to adjust an amount of light incident on the image sensor 9003. The filter 8003 is disposed between the seventh lens 7003 and the image sensor 9003 to block infrared rays. The image sensor 9003 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 5 , the stop is disposed at a distance of 1.4250 mm from the object-side surface of the first lens 1003 toward the imaging plane of the optical imaging system 3. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 3 listed in Table 57 that appears later in this application.

Table 5 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 5 , and Table 6 below shows aspherical surface coefficients of the lenses of FIG. 5 .

TABLE 5 Surface Radius of Thickness/ Index of Abbe Effective Aperture No. Element Curvature Distance Refraction Number Radius S1 First 2.3706 0.5431 1.546 56.114 1.572 S2 Lens 3.8377 0.1516 1.517 S3 Second 3.4329 0.7078 1.546 56.114 1.478 S4 Lens −17.0251 0.0225 1.428 S5 (Stop) 5.1429 0.2247 1.679 19.236 1.300 S6 Third 2.5333 0.5888 1.230 Lens S7 Fourth −1446.167 0.3404 1.679 19.236 1.404 S8 Lens −1446.167 0.2070 1.600 S9 Fifth 3.6434 0.3264 1.546 56.114 1.857 S10 Lens 3.8224 0.3171 2.199 S11 Sixth 3.8509 0.4406 1.679 19.236 2.415 S12 Lens 3.0494 0.1774 2.808 S13 Seventh 1.7430 0.6133 1.537 53.955 3.115 S14 Lens 1.5635 0.2466 3.314 S15 Filter Infinity 0.1100 1.519 64.166 3.655 S16 Infinity 0.8047 3.688 S17 Imaging Infinity 0.0051 4.075 Plane

TABLE 6 K A B C D E F G H J S1 −7.5196 0.0476 −0.039 0.0108 −0.0002 −0.006 0.0045 −0.0012 0.0001 0 S2 −19.661 −0.0106 −0.0481 0.0183 0.0105 −0.0109 0.0039 −0.0006  3E−05 0 S3 0.042 −0.0249 −0.0196 0.0094 0.0041 0.0108 −0.014 0.0056 −0.0008 0 S4 0 0.0098 −0.0507 0.0341 0.0229 −0.0518 0.0341 −0.0103 0.0012 0 S5 −5.6502 −0.0476 0.0152 −0.0398 0.11 −0.1327 0.082 −0.0252 0.0031 0 S6 0.5327 −0.067 0.0583 −0.0705 0.0922 −0.0854 0.0499 −0.0161 0.0024 0 S7 0 −0.0158 −0.0083 −0.0305 0.0756 −0.0736 0.035 −0.0077 0.0005 0 S8 0 −0.0099 −0.0427 0.0077 0.0285 −0.0272 0.01 −0.0013 0 0 S9 −44.395 0.1048 −0.1251 0.08 −0.0437 0.0187 −0.0058 0.001 −7E−05 0 S10 −4.0715 −0.0175 0.0211 −0.0368 0.0252 −0.01 0.0024 −0.0003  2E−05 0 S11 −1.1211 0.0034 −0.0742 0.0637 −0.0381 0.0134 −0.0026 0.0003 −1E−05 0 S12 0.0464 −0.092 0.0339 −0.0168 0.0044 −0.0005 1E−05  3E−06 −2E−07 0 S13 −0.795 −0.2987 0.11 −0.0259 0.0046 −0.0007 7E−05 −5E−06  2E−07 −5E−09 S14 −1.3233 −0.199 0.0846 −0.0285 0.0073 −0.0013 0.0002 −1E−05  5E−07 −9E−09

Fourth Example

FIG. 7 is a view illustrating a fourth example of an optical imaging system, and FIG. 8 illustrates aberration curves of the optical imaging system of FIG. 7 .

An optical imaging system 4 includes a first lens 1004, a second lens 2004, a third lens 3004, a fourth lens 4004, a fifth lens 5004, a sixth lens 6004, and a seventh lens 7004.

The first lens 1004 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2004 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. The third lens 3004 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4004 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The fifth lens 5004 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6004 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6004. The seventh lens 7004 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7004, and one inflection point is formed on the image-side surface of the seventh lens 7004.

The optical imaging system 4 further includes a stop, a filter 8004, and an image sensor 9004. The stop is disposed between the second lens 2004 and the third lens 3004 to adjust an amount of light incident on the image sensor 9004. The filter 8004 is disposed between the seventh lens 7004 and the image sensor 9004 to block infrared rays. The image sensor 9004 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 7 , the stop is disposed at a distance of 1.1686 mm from the object-side surface of the first lens 1004 toward the imaging plane of the optical imaging system 4. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 4 listed in Table 57 that appears later in this application.

Table 7 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 7 , and Table 8 below shows aspherical surface coefficients of the lenses of FIG. 7 .

TABLE 7 Thick- ness/ Effective Surface Radius of Dis- Index of Abbe Aperture No. Element Curvature tance Refraction Number Radius  S1 First 1.9512 0.4488 1.546 56.114 1.307  S2 Lens 3.1152 0.1260 1.253  S3 Second 2.8686 0.5753 1.546 56.114 1.214  S4 Lens −12.9825 0.0186 1.180  S5 (Stop) 4.5064 0.1856 1.679 19.236 1.074  S6 Third 2.1969 0.5197 1.016 Lens  S7 Fourth −2108.865 0.2796 1.679 19.236 1.179  S8 Lens −6755.436 0.1715 1.338  S9 Fifth 3.1135 0.2734 1.546 56.114 1.528 S10 Lens 3.2672 0.2417 1.808 S11 Sixth 3.2228 0.3650 1.679 19.236 1.996 S12 Lens 2.5388 0.1438 2.320 S13 Seventh 1.4451 0.5122 1.537 53.955 2.500 S14 Lens 1.2680 0.2501 2.738 S15 Filter Infinity 0.1100 1.519 64.166 2.940 S16 Infinity 0.5924 2.971 S17 Imaging Infinity 0.0054 3.251 Plane

TABLE 8 K A B C D E F G H J  S1 −7.5279 0.0857 −0.105 0.0528 −0.0256 −0.0221 0.0379 −0.0166 0.0023 0  S2 −19.893 −0.0142 −0.1337 0.0682 0.0621 −0.0783 0.0306 −0.0031 −0.0006 0  S3 −0.0142 −0.0449 −0.0418 −0.0147 0.1136 0.012 −0.1333 0.0892 −0.0193 0  S4 0 0.0281 −0.189 0.276 −0.0808 −0.2297 0.2908 −0.1382 0.024 0  S5 −6.2325 −0.0763 −0.0054 −0.0795 0.6054 −1.1875 1.107 −0.5047 0.0912 0  S6 0.4782 −0.115 0.1396 −0.2676 0.5637 −0.7991 0.6898 −0.325 0.0682 0  S7 0 −0.0188 −0.0772 0.0717 0.0184 −0.081 0.0225 0.0277 −0.0139 0  S8 0 −0.0127 −0.1356 0.0837 0.0781 −0.1502 0.0847 −0.0163 0 0  S9 −49.08 0.1815 −0.3205 0.2837 −0.2161 0.1317 −0.0595 0.0158 −0.0017 0 S10 −5.4303 −0.0205 0.025 −0.1003 0.1046 −0.0624 0.0222 −0.0043 0.0003 0 S11 −1.136 0.0314 −0.2615 0.3261 −0.2695 0.133 −0.0369 0.0053 −0.0003 0 S12 0.0272 −0.1293 0.0241 5E−05 −0.0123 0.0085 −0.0024 0.0003 −2E−05  0 S13 −0.8 −0.5247 0.2994 −0.1227 0.0414 −0.0108 0.002 −0.0002 2E−05 −4E−07 S14 −1.3207 −0.3666 0.2425 −0.1248 0.0468 −0.0121 0.002 −0.0002 1E−05 −3E−07

Fifth Example

FIG. 9 is a view illustrating a fifth example of an optical imaging system, and FIG. 10 illustrates aberration curves of the optical imaging system of FIG. 9 .

An optical imaging system 5 includes a first lens 1005, a second lens 2005, a third lens 3005, a fourth lens 4005, a fifth lens 5005, a sixth lens 6005, and a seventh lens 7005.

The first lens 1005 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2005 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3005 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4005 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5005 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6005 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6005. The seventh lens 7005 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7005.

The optical imaging system 5 further includes a stop, a filter 8005, and an image sensor 9005. The stop is disposed between the first lens 1005 and the second lens 2005 to adjust an amount of light incident on the image sensor 9005. The filter 8005 is disposed between the seventh lens 7005 and the image sensor 9005 to block infrared rays. The image sensor 9005 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 9 , the stop is disposed at distance of 0.3830 mm from the object-side surface of the first lens 1005 toward the imaging plane of the optical imaging system 5. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 5 listed in Table 57 that appears later in this application.

Table 9 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 9 , and Table 10 below shows aspherical surface coefficients of the lenses of FIG. 9 .

TABLE 9 Thick- ness/ Effective Surface Radius of Dis- Index of Abbe Aperture No. Element Curvature tance Refraction Number Radius  S1 First 2.1824 0.3329 1.546 56.114 1.380  S2 Lens 1.9439 0.0500 1.369  S3 (Stop) 1.6857 0.7322 1.546 56.114 1.335  S4 Second 28.3727 0.0500 1.264 Lens  S5 Third 7.1536 0.2200 1.679 19.236 1.185  S6 Lens 2.9223 0.4264 1.050  S7 Fourth 46.9146 0.3121 1.646 23.528 1.112  S8 Lens 17.5860 0.2616 1.268  S9 Fifth 2.2655 0.2700 1.646 23.528 1.774 S10 Lens 2.3143 0.3731 1.839 S11 Sixth 8.5186 0.6078 1.546 56.114 2.160 S12 Lens −1.9871 0.3782 2.308 S13 Seventh −4.7165 0.3600 1.546 56.114 2.780 S14 Lens 1.8919 0.1457 2.998 S15 Filter Infinity 0.1100 1.519 64.166 3.353 S16 Infinity 0.6600 3.385 S17 Imaging Infinity 0.0100 3.712 Plane

TABLE 10 K A B C D E F G H  S1 −3.5715 0.0005 0.0011 −0.0181 0.0025 0.0107 −0.0084 0.0026 −0.0003  S2 −9.1496 −0.0513 −0.0055 0.0116 0.0161 −0.0207 0.0078 −0.001 0  S3 −2.5622 −0.0879 0.1115 −0.1204 0.1625 −0.1325 0.0578 −0.0118 0.0006  S4 −90 −0.078 0.2103 −0.4384 0.6397 −0.6153 0.3736 −0.1288 0.0189  S5 0 −0.1133 0.2975 −0.5447 0.7496 −0.7199 0.4525 −0.1642 0.0257  S6 4.6946 −0.0705 0.1434 −0.2144 0.1998 −0.0956 −0.0142 0.0399 −0.0137  S7 0 −0.0972 0.1221 −0.3303 0.5457 −0.6222 0.4555 −0.1995 0.0405  S8 0 −0.1596 0.2027 −0.3281 0.3412 −0.2472 0.1212 −0.0385 0.0064  S9 −18.27 −0.0564 −0.0069 0.0518 −0.0566 0.0228 −0.0011 −0.0019 0.0004 S10 −15.127 −0.0603 −0.0145 0.0594 −0.0601 0.0318 −0.0096 0.0015 −1E−04 S11 0 0.0027 −0.0398 0.025 −0.0137 0.005 −0.001 1E−04 −4E−06 S12 −1.1693 0.1224 −0.1006 0.0535 −0.0195 0.005 −0.0008 8E−05 −3E−06 S13 −4.4446 −0.097 −0.0137 0.0358 −0.0141 0.0028 −0.0003 2E−05 −5E−07 S14 −8.7431 −0.0906 0.0342 −0.009 0.0017 −0.0002 2E−05 −1E−06   3E−08

Sixth Example

FIG. 11 is a view illustrating a sixth example of an optical imaging system, and FIG. 12 illustrates aberration curves of the optical imaging system of FIG. 11 .

An optical imaging system 6 includes a first lens 1006, a second lens 2006, a third lens 3006, a fourth lens 4006, a fifth lens 5006, a sixth lens 6006, and a seventh lens 7006.

The first lens 1006 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2006 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3006 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4006 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5006 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The sixth lens 6006 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6006. The seventh lens 7006 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7006.

The optical imaging system 6 further includes a stop, a filter 8006, and an image sensor 9006. The stop is disposed between the first lens 1006 and the second lens 2006 to adjust an amount of light incident on the image sensor 9006. The filter 8006 is disposed between the seventh lens 7006 and the image sensor 9006 to block infrared rays. The image sensor 9006 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 11 , the stop is disposed at a distance of 0.7312 mm from the object-side surface of the first lens 1006 toward the imaging plane of the optical imaging system 6. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 6 listed in Table 57 that appears later in this application.

Table 11 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 11 , and Table 12 below shows aspherical surface coefficients of the lenses of FIG. 11 .

TABLE 11 Thick- ness/ Effective Surface Radius of Dis- Index of Abbe Aperture No. Element Curvature tance Refraction Number Radius  S1 First 1.73233 0.73124 1.546 56.114 1.250  S2 Lens 12.53699 0.07002 1.181 (Stop)  S3 Second 5.58930 0.20000 1.667 20.353 1.147  S4 Lens 2.57397 0.39715 1.100  S5 Third 8.06552 0.38474 1.546 56.114 1.128  S6 Lens 7.83668 0.19259 1.247  S7 Fourth 6.68716 0.24423 1.546 56.114 1.276  S8 Lens 30.32847 0.27130 1.374  S9 Fifth −3.28742 0.24968 1.667 20.353 1.481 S10 Lens −4.51593 0.13884 1.734 S11 Sixth 5.67988 0.51987 1.546 56.114 2.150 S12 Lens −1.89003 0.31663 2.318 S13 Seventh −3.93255 0.30000 1.546 56.114 2.640 S14 Lens 1.74183 0.19371 2.747 S15 Filter Infinity 0.11000 1.518 64.166 3.146 S16 Infinity 0.77000 S17 Imaging Infinity 0.01000 3.536 3.177 Plane

TABLE 12 K A B C D E F G H J  S1 −0.7464 0.0139 0.0344 −0.0749 0.1029 −0.0706 0.0173 0.0042 −0.0023 0  S2 36.669 −0.0823 0.195 −0.3067 0.3634 −0.323 0.1902 −0.0632 0.0086 0  S3 −1.3559 −0.1603 0.3305 −0.4059 0.3324 −0.1787 0.0673 −0.0166 0.0018 0  S4 −0.4109 −0.0907 0.1444 0.1155 −0.7969 1.5009 −1.4406 0.7219 −0.147 0  S5 0 −0.0739 0.0463 −0.1203 0.1165 −0.0578 −0.0089 0.0233 −0.0057 0  S6 0 −0.0932 0.0034 0.0521 −0.1827 0.2457 −0.2173 0.1126 −0.0241 0  S7 25.148 −0.1235 −0.1887 0.3763 −0.554 0.6731 −0.5796 0.2782 −0.0538 0  S8 −99 −9E−05 −0.3274 0.3588 −0.3195 0.3451 −0.2608 0.0995 −0.0144 0  S9 −70.894 0.0205 0.0483 −0.5284 0.7583 −0.4915 0.1636 −0.0271 0.0018 0 S10 2.2832 0.1759 −0.3448 0.2283 −0.0716 0.011 −0.0007 −4E−06   1E−06 0 S11 −99 0.1188 −0.2169 0.1675 −0.0871 0.0276 −0.0049 0.0005 −2E−05 0 S12 −3.3067 0.1644 −0.1849 0.1159 −0.049 0.0138 −0.0024 0.0002 −9E−06 0 S13 −2.4772 −0.1026 −0.0482 0.074 −0.0308 0.0067 −0.0008 6E−05 −2E−06 0 S14 −1.1028 −0.2935 0.2033 −0.1127 0.0457 −0.0129 0.0024 −0.0003  2E−05 −5E−07

Seventh Example

FIG. 13 is a view illustrating a seventh example of an optical imaging system, and FIG. 14 illustrates aberration curves of the optical imaging system of FIG. 13 .

An optical imaging system 7 includes a first lens 1007, a second lens 2007, a third lens 3007, a fourth lens 4007, a fifth lens 5007, a sixth lens 6007, and a seventh lens 7007.

The first lens 1007 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2007 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. The third lens 3007 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4007 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5007 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6007 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6007. The seventh lens 7007 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7007, and one inflection point is formed on the image-side surface of the seventh lens 7007.

The optical imaging system 7 further includes a stop, a filter 8007, and an image sensor 9007. The stop is disposed between the second lens 2007 and the third lens 3007 to adjust an amount of light incident on the image sensor 9007. The filter 8007 is disposed between the seventh lens 7007 and the image sensor 9007 to block infrared rays. The image sensor 9007 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 13 , the stop is disposed at a distance of 1.1577 mm from the object-side surface of the first lens 1007 toward the imaging plane of the optical imaging system 7. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 7 listed in Table 57 that appears later in this application.

Table 13 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 13 , and Table 14 below shows aspherical surface coefficients of the lenses of FIG. 13 .

TABLE 13 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius  S1 First 2.141 0.481 1.546 56.114 1.450  S2 Lens 3.251 0.110 1.350  S3 Second 3.253 0.542 1.546 56.114 1.285  S4 Lens −15.773 0.025 1.232  S5 (Stop) 8.425 0.230 1.679 19.236 1.157  S6 Third 3.514 0.625 1.095 Lens  S7 Fourth 25.986 0.296 1.679 19.236 1.265  S8 Lens 15.894 0.230 1.452  S9 Fifth 3.048 0.400 1.546 56.114 1.675 S10 Lens 3.616 0.290 2.092 S11 Sixth 3.762 0.400 1.679 19.236 2.153 S12 Lens 2.792 0.204 2.476 S13 Seventh 1.614 0.510 1.537 53.955 2.938 S14 Lens 1.326 0.196 3.102 S15 Filter Infinity 0.110 1.518 64.197 3.420 S16 Infinity 0.639 3.450 S17 Imaging Infinity 0.011 3.730 Plane

TABLE 14 K A B C D E F G H J  S1 −8.038 0.0707 −0.0797 0.0334 0.0072 −0.0491 0.0465 −0.0186 0.0032 −0.0002  S2 −20.594 −0.0019 −0.1494 0.2041 −0.2922 0.3755 −0.3085 0.1486 −0.0387 0.0042  S3 −0.0908 −0.0339 −0.0641 0.1368 −0.2821 0.4921 −0.4815 0.2605 −0.0746 0.0088  S4 −0.4822 −0.0436 0.1761 −0.3256 0.1999 0.1916 −0.4291 0.3203 −0.1141 0.0162  S5 −1.1841 −0.1073 0.2544 −0.4683 0.4991 −0.2863 0.0565 0.0325 −0.0229 0.0044  S6 0.8733 −0.0693 0.0357 0.2048 −0.8833 1.7328 −1.9742 1.3464 −0.5106 0.083  S7 −0.4999 −0.0314 0.0135 −0.2894 0.9716 −1.7181 1.7923 −1.1152 0.3837 −0.0563  S8 −1E−06 −0.0273 −0.1177 0.212 −0.2544 0.2157 −0.1264 0.0469 −0.0093 0.0007  S9 −41.843 0.1624 −0.3487 0.4016 −0.3105 0.1396 −0.027 −0.0038 0.0026 −0.0003 S10 −5.1424 0.0397 −0.1364 0.1569 −0.1229 0.0633 −0.0212 0.0044 −0.0005  3E−05 S11 −2.1666 0.0356 −0.1809 0.1985 −0.1438 0.0641 −0.0173 0.0028 −0.0002  9E−06 S12 −0.0207 −0.1043 0.0239 −0.0063 −0.0007 0.0007 −3E−06 −4E−05 7E−06 −4E−07 S13 −0.7948 −0.4128 0.1863 −0.0516 0.0101 −0.0015 0.0002 −1E−05 6E−07 −1E−08 S14 −1.3226 −0.3105 0.1713 −0.0712 0.0213 −0.0043 0.0006 −5E−05 2E−06 −5E−08

Eighth Example

FIG. 15 is a view illustrating an eighth example of an optical imaging system, and FIG. 16 illustrates aberration curves of the optical imaging system of FIG. 15 .

An optical imaging system 8 includes a first lens 1008, a second lens 2008, a third lens 3008, a fourth lens 4008, a fifth lens 5008, a sixth lens 6008, and a seventh lens 7008.

The first lens 1008 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2008 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3008 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4008 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5008 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6008 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6008. The seventh lens 7008 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7008.

The optical imaging system 8 further includes a stop, a filter 8008, and an image sensor 9008. The stop is disposed between the second lens 2008 and the third lens 3008 to adjust an amount of light incident on the image sensor 9008. The filter 8008 is disposed between the seventh lens 7008 and the image sensor 9008 to block infrared rays. The image sensor 9008 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 15 , the stop is disposed at a distance of 1.0800 mm from the object-side surface of the first lens 1008 toward the imaging plane of the optical imaging system 8. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 8 listed in Table 57 that appears later in this application.

Table 15 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 15 , and Table 16 below shows aspherical surface coefficients of the lenses of FIG. 15 .

TABLE 15 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius  S1 First 2.1367244 0.486053 1.546 56.114 1.360  S2 Lens 2.8897668 0.087572 1.331  S3 Second 3.1970288 0.481363 1.546 56.114 1.301  S4 Lens 109.26781 0.025 1.264  S5 (Stop) 8.2164833 0.333222 1.679 19.236 1.218  S6 Third 3.6430265 0.428709 1.229 Lens  S7 Fourth 5.149363 0.374385 1.546 56.114 1.353  S8 Lens 7.9835412 0.393693 1.392  S9 Fifth 3.8134324 0.4 1.546 56.114 1.576 S10 Lens 4.8504303 0.288816 2.010 S11 Sixth 3.8912859 0.4 1.546 56.114 1.916 S12 Lens 3.0824847 0.229858 2.371 S13 Seventh 1.6011178 0.493312 1.546 56.114 2.526 S14 Lens 1.2142472 0.218016 2.787 S15 Filter Infinity 0.21 1.518 64.197 3.238 S16 Infinity 0.634932 3.316 S17 Imaging Infinity 0.015 3.728 Plane

TABLE 16 K A B C D E F G H J  S1 −1 −0.0136 0.0247 −0.0811 0.0925 −0.0456 −0.0139 0.0275 −0.0118 0.0017  S2 −13.222 0.0184 −0.091 −0.0856 0.3055 −0.3421 0.2293 −0.0976 0.0238 −0.0025  S3 −1.2237 −0.0255 0.013 −0.2994 0.6492 −0.662 0.4089 −0.1567 0.0332 −0.0029  S4 −7.0515 −0.018 0.0942 −0.4684 1.1965 −1.7785 1.5984 −0.8543 0.2492 −0.0305  S5 8.9885 −0.0606 0.147 −0.5476 1.4146 −2.2793 2.2356 −1.2976 0.4106 −0.0546  S6 1.6556 −0.053 0.0664 −0.1724 0.4882 −0.9461 1.1092 −0.7563 0.2786 −0.0429  S7 −4.3409 −0.0524 −0.0067 0.1244 −0.3711 0.5503 −0.4701 0.228 −0.0561 0.0052  S8 5.8589 −0.0866 0.13 −0.4361 0.9157 −1.2163 1.0086 −0.506 0.1405 −0.0165  S9 −43.521 0.0853 −0.1755 0.2257 −0.2234 0.1539 −0.0732 0.0221 −0.0038 0.0003 S10 −3.1047 0.0435 −0.1427 0.1592 −0.1109 0.05 −0.0153 0.0031 −0.0004 2E−05 S11 −16.199 0.1264 −0.2435 0.2571 −0.2182 0.1176 −0.0381 0.0072 −0.0007 3E−05 S12 0.1758 −0.0767 0.0734 −0.0745 0.0337 −0.008 0.0011 −7E−05 2E−06 −1E−08  S13 −0.8173 −0.4272 0.2044 −0.0489 0.002 0.0021 −0.0006  8E−05 −6E−06  2E−07 S14 −1.397 −0.3515 0.2336 −0.1198 0.0447 −0.0113 0.0019 −0.0002 1E−05 −3E−07 

Ninth Example

FIG. 17 is a view illustrating a ninth example of an optical imaging system, and FIG. 18 illustrates aberration curves of the optical imaging system of FIG. 17 .

An optical imaging system 9 includes a first lens 1009, a second lens 2009, a third lens 3009, a fourth lens 4009, a fifth lens 5009, a sixth lens 6009, and a seventh lens 7009.

The first lens 1009 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2009 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3009 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4009 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5009 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6009 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6009. The seventh lens 7009 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7009, and one inflection point is formed on the image-side surface of the seventh lens 7009.

The optical imaging system 9 further includes a stop, a filter 8009, and an image sensor 9009. The stop is disposed between the second lens 2009 and the third lens 3009 to adjust an amount of light incident on the image sensor 9009. The filter 8009 is disposed between the seventh lens 7009 and the image sensor 9009 to block infrared rays. The image sensor 9009 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 17 , the stop is disposed at a distance of 1.0767 mm from the object-side surface of the first lens 1009 toward the imaging plane of the optical imaging system 9. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 9 listed in Table 57 that appears later in this application.

Table 17 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 17 , and Table 18 below shows aspherical surface coefficients of the lenses of FIG. 17 .

TABLE 17 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius  S1 First 2.1183051 0.467301 1.546 56.114 1.360  S2 Lens 2.7465072 0.088291 1.343  S3 Second 2.805316 0.495083 1.546 56.114 1.313  S4 Lens 29.972181 0.026058 1.266  S5 (Stop) 5.6204988 0.273577 1.679 19.236 1.212  S6 Third 2.8589333 0.365293 1.199 Lens  S7 Fourth 6.0851103 0.415715 1.546 56.114 1.285  S8 Lens 19.143835 0.530007 1.350  S9 Fifth 5.7830909 0.4 1.679 19.236 1.600 S10 Lens 4.5644102 0.188701 2.100 S11 Sixth 2.807724 0.444625 1.546 56.114 1.903 S12 Lens 3.201154 0.276382 2.470 S13 Seventh 1.6500839 0.458527 1.546 56.114 2.646 S14 Lens 1.1944054 0.21044 2.806 S15 Filter Infinity 0.21 1.518 64.197 3.241 S16 Infinity 0.643292 3.319 S17 Imaging Infinity 0.006708 3.729 Plane

TABLE 18 K A B C D E F G H J  S1 −1 −0.0103 0.0078 −0.0588 0.0925 −0.0904 0.0486 −0.0119 0.0004 0.0002  S2 −13.05 0.0258 −0.1274 0.035 0.0617 −0.0405 0.0003 0.0049 −0.0007 −0.0001  S3 −1.2154 −0.0166 −0.0602 −0.0171 0.0625 0.0481 −0.1007 0.0511 −0.0092 0.0002  S4 −7.0515 −0.047 0.2681 −0.8387 1.4546 −1.5426 1.0264 −0.4201 0.0974 −0.0099  S5 8.8287 −0.0982 0.3106 −0.8268 1.4538 −1.7174 1.3464 −0.6715 0.1944 −0.025  S6 1.7217 −0.0695 0.0939 −0.1196 0.1421 −0.2108 0.2773 −0.2257 0.0997 −0.0182  S7 −1.4309 −0.0448 −0.0056 0.0299 −0.0484 −0.0039 0.0856 −0.1013 0.0511 −0.0095  S8 5.8592 −0.0455 −0.0133 0.0337 −0.0729 0.0922 −0.0766 0.0411 −0.0128 0.0018  S9 −43.521 0.0008 −0.0239 0.0222 −0.0173 0.0051 −0.0002 −0.0003 5E−05 5E−06 S10 −11.855 −0.0163 −0.0578 0.0832 −0.067 0.0334 −0.0109 0.0023 −0.0003 1E−05 S11 −16.199 0.1024 −0.1959 0.1931 −0.1564 0.0797 −0.0243 0.0044 −0.0004 2E−05 S12 0.1668 −0.0913 0.11 −0.1075 0.0537 −0.0157 0.0029 −0.0003 2E−05 −6E−07  S13 −0.8022 −0.4375 0.2118 −0.049 0.0016 0.0021 −0.0006 7E−05 −4E−06  1E−07 S14 −1.407 −0.3709 0.2499 −0.1268 0.0461 −0.0114 0.0018 −0.0002 1E−05 −3E−07 

Tenth Example

FIG. 19 is a view illustrating a tenth example of an optical imaging system, and FIG. 20 illustrates aberration curves of the optical imaging system of FIG. 19 .

An optical imaging system 10 includes a first lens 1010, a second lens 2010, a third lens 3010, a fourth lens 4010, a fifth lens 5010, a sixth lens 6010, and a seventh lens 7010.

The first lens 1010 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2010 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3010 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4010 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5010 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6010 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6010. The seventh lens 7010 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7010.

The optical imaging system 10 further includes a stop, a filter 8010, and an image sensor 9010. The stop is disposed between the second lens 2010 and the third lens 3010 to adjust an amount of light incident on the image sensor 9010. The filter 8010 is disposed between the seventh lens 7010 and the image sensor 9010 to block infrared rays. The image sensor 9010 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 19 , the stop is disposed at a distance of 1.1782 mm from the object-side surface of the first lens 1010 toward the imaging plane of the optical imaging system 10. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 10 listed in Table 57 that appears later in this application.

Table 19 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 19 , and Table 20 below shows aspherical surface coefficients of the lenses of FIG. 19 .

TABLE 19 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius  S1 First 2.3673866 0.52496 1.546 56.114 1.449  S2 Lens 3.194732 0.05968 1.420  S3 Second 3.4203396 0.567044 1.546 56.114 1.396  S4 Lens 70.973752 0.026546 1.328  S5 (Stop) 7.7783333 0.350469 1.679 19.236 1.286  S6 Third 3.8162291 0.409426 1.313 Lens  S7 Fourth 5.5916886 0.369187 1.546 56.114 1.426  S8 Lens 7.9939167 0.39653 1.495  S9 Fifth 4.1003359 0.426003 1.546 56.114 1.707 S10 Lens 5.3728393 0.303377 1.986 S11 Sixth 4.360929 0.424063 1.679 19.236 1.999 S12 Lens 3.5684544 0.223456 2.401 S13 Seventh 1.7878712 0.541352 1.546 56.114 2.495 S14 Lens 1.3975055 0.200463 2.837 S15 Filter Infinity 0.21 1.518 64.197 3.186 S16 Infinity 0.831011 3.256 S17 Imaging Infinity 0.001244 3.785 Plane

TABLE 20 K A B C D E F G H J  S1 −1 −0.006 −0.0037 −0.012 0.012 0.0136 −0.0351 0.0267 −0.009 0.0011  S2 −13.101 0.0148 −0.0546 −0.0452 0.1269 −0.1111 0.056 −0.0175 0.0031 −0.0002  S3 −1.2472 −0.0205 0.0163 −0.1488 0.2518 −0.2171 0.1218 −0.045 0.0097 −0.0009  S4 −7.0515 −0.0205 0.1049 −0.3805 0.7515 −0.8792 0.6257 −0.2656 0.0617 −0.006  S5 8.9156 −0.0324 −0.0045 0.0638 −0.1003 0.0567 0.0072 −0.0234 0.0103 −0.0015  S6 1.6638 −0.0267 −0.1125 0.5983 −1.3543 1.7261 −1.3193 0.5999 −0.1494 0.0157  S7 −4.619 −0.0378 −0.0049 0.0644 −0.1511 0.1787 −0.1225 0.0479 −0.0096 0.0007  S8 5.6116 −0.0667 0.143 −0.4869 0.9313 −1.0571 0.7241 −0.2938 0.0651 −0.006  S9 −44.124 0.0571 −0.0758 0.0454 −0.0145 0.0009 5E−05 0.0002 −8E−05 9E−06 S10 −4.9813 0.0353 −0.0999 0.1024 −0.0647 0.026 −0.0068 0.0011 −0.0001 4E−06 S11 −15.42 0.099 −0.1649 0.1482 −0.1003 0.0426 −0.0109 0.0016 −0.0001 5E−06 S12 0.1791 −0.0585 0.0531 −0.0451 0.0177 −0.0038 0.0005 −4E−05  2E−06 −3E−08  S13 −0.825 −0.303 0.1166 −0.0228 0.0011 0.0005 −0.0001  1E−05 −7E−07 1E−08 S14 −1.3872 −0.2937 0.1877 −0.0863 0.0269 −0.0055 0.0007 −6E−05  3E−06 −5E−08 

Eleventh Example

FIG. 21 is a view illustrating an eleventh example of an optical imaging system, and FIG. 22 illustrates aberration curves of the optical imaging system of FIG. 21 .

An optical imaging system 11 includes a first lens 1011, a second lens 2011, a third lens 3011, a fourth lens 4011, a fifth lens 5011, a sixth lens 6011, and a seventh lens 7011.

The first lens 1011 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2011 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3011 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4011 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5011 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6011 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6011. The seventh lens 7011 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7011, and one inflection point is formed on the image-side surface of the seventh lens 7011.

The optical imaging system 11 further includes a stop, a filter 8011, and an image sensor 9011. The stop is disposed between the second lens 2011 and the third lens 3011 to adjust an amount of light incident on the image sensor 9011. The filter 8011 is disposed between the seventh lens 7011 and the image sensor 9011 to block infrared rays. The image sensor 9011 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 21 , the stop is disposed at a distance of 1.2296 mm from the object-side surface of the first lens 1011 toward the imaging plane of the optical imaging system 11. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 11 listed in Table 57 that appears later in this application.

Table 21 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 21 , and Table 22 below shows aspherical surface coefficients of the lenses of FIG. 21 .

TABLE 21 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius  S1 First 2.0759937 0.461868 1.546 56.114 1.450  S2 Lens 2.4626776 0.142767 1.423  S3 Second 2.5138054 0.6 1.546 56.114 1.392  S4 Lens 29.011046 0.025 1.339  S5 (Stop) 8.6847676 0.23 1.679 19.236 1.295  S6 Third 3.5580278 0.403456 1.273 Lens  S7 Fourth 4.7911408 0.352214 1.546 56.114 1.378  S8 Lens 7.0752276 0.349153 1.451  S9 Fifth 4.2812245 0.35 1.546 56.114 1.632 S10 Lens 6.1353451 0.360979 2.012 S11 Sixth 4.4147672 0.43 1.679 19.236 2.013 S12 Lens 3.9218806 0.295711 2.303 S13 Seventh 1.740331 0.438887 1.546 56.114 2.548 S14 Lens 1.2235575 0.199966 2.831 S15 Filter Infinity 0.21 1.518 64.197 3.299 S16 Infinity 0.637453 3.370 S17 Imaging Infinity 0.012547 3.731 Plane

TABLE 22 K A B C D E F G H J S1 −1 −0.0092 0.003 −0.0414 0.0636 −0.0562 0.026 −0.0049 −0.0002 0.0001 S2 −11.557 0.0601 −0.1844 0.2568 −0.3524 0.3604 −0.23 0.0871 −0.018 0.0016 S3 −0.8307 −0.0024 −0.0852 0.1656 −0.3174 0.3977 −0.2764 0.1063 −0.0212 0.0016 S4 33.131 −0.027 0.1754 −0.4193 0.3931 −0.0382 −0.2294 0.1977 −0.0691 0.0091 S5 14.848 −0.09 0.2473 −0.422 0.2881 0.1413 −0.4099 0.3093 −0.1063 0.0142 S6 2.0645 −0.0757 0.0883 0.0177 −0.3102 0.6013 −0.6108 0.357 −0.1119 0.0146 S7 −10.536 −0.0399 −0.0508 0.2144 −0.4431 0.5288 −0.3825 0.1604 −0.034 0.0025 S8 1.3378 −0.0489 −0.0512 0.1032 −0.1013 0.0149 0.0599 −0.0576 0.0222 −0.0032 S9 −44.096 0.0784 −0.1355 0.1317 −0.0913 0.0374 −0.0091 0.001 4E−05 −1E−05 S10 −6.651 0.049 −0.1189 0.1277 −0.0852 0.0342 −0.0083 0.0012 −1E−04   3E−06 S11 −13.816 0.0584 −0.1268 0.1161 −0.0837 0.0379 −0.0102 0.0016 −0.0001  5E−06 S12 1.0596 −0.0574 0.0273 −0.0248 0.0087 −0.0016 0.0002 −9E−06 2E−07 −5E−10 S13 −0.8717 −0.4042 0.1652 −0.0262 −0.0057 0.0037 −0.0008  9E−05 −6E−06   1E−07 S14 −1.3714 −0.3652 0.2385 −0.1205 0.0439 −0.0107 0.0017 −0.0002 9E−06 −2E−07

Twelfth Example

FIG. 23 is a view illustrating a twelfth example of an optical imaging system, and FIG. 24 illustrates aberration curves of the optical imaging system of FIG. 23 .

An optical imaging system 12 includes a first lens 1012, a second lens 2012, a third lens 3012, a fourth lens 4012, a fifth lens 5012, a sixth lens 6012, and a seventh lens 7012.

The first lens 1012 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2012 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3012 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4012 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5012 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6012 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6012. The seventh lens 7012 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7012, and one inflection point is formed on the image-side surface of the seventh lens 7012.

The optical imaging system 12 further includes a stop, a filter 8012, and an image sensor 9012. The stop is disposed between the second lens 2012 and the third lens 3012 to adjust an amount of light incident on the image sensor 9012. The filter 8012 is disposed between the seventh lens 7012 and the image sensor 9012 to block infrared rays. The image sensor 9012 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 23 , the stop is disposed at a distance of 1.1793 mm from the object-side surface of the first lens 1012 toward the imaging plane of the optical imaging system 12. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 12 listed in Table 57 that appears later in this application.

Table 23 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 23 , and Table 24 below shows aspherical surface coefficients of the lenses of FIG. 23 .

TABLE 23 Sur- Thick- Effective face Radius of ness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1 First  2.3878602 0.35 1.546 56.114 1.470 S2 Lens  2.621324 0.10425 1.439 S3 Second  2.5382264 0.7 1.546 56.114 1.405 S4 Lens 36.207255 0.025 1.322 S5 (Stop)  7.7960711 0.23 1.679 19.236 1.287 S6 Third  3.4912075 0.396134 1.325 Lens S7 Fourth  5.4331241 0.505386 1.546 56.114 1.461 S8 Lens  9.3905062 0.443673 1.563 S9 Fifth  4.6788866 0.484222 1.546 56.114 1.772 S10 Lens  9.5732832 0.475792 2.209 S11 Sixth  7.1894204 0.475353 1.679 19.236 2.238 S12 Lens  3.8397107 0.215445 2.557 S13 Seventh  1.8137383 0.559854 1.546 56.114 3.026 S14 Lens  1.3872365 0.230078 3.262 S15 Filter Infinity 0.11 1.518 64.197 3.724 S16 Infinity 0.635 3.763 S17 Imaging Infinity 0.015 4.160 Plane

TABLE 24 K A B C D E F G H J S1 −0.9977 −0.0046 −0.0139 −0.024 0.0712 −0.0925 0.0658 −0.0257 0.0051 −0.0004 S2 −10.008 0.0879 −0.2624 0.4378 −0.5581 0.4751 −0.2476 0.0753 −0.0122 0.0008 S3 −0.5121 −0.0082 0.0297 −0.2049 0.402 −0.4509 0.3219 −0.1392 0.0325 −0.0031 S4 42.587 −0.0077 −0.0816 0.5107 −1.169 1.3206 −0.8193 0.2839 −0.0514 0.0038 S5 14.891 −0.0724 0.0409 0.4245 −1.2505 1.5731 −1.0799 0.4229 −0.0892 0.0079 S6 1.8054 −0.0886 0.1906 −0.2777 0.2837 −0.2167 0.1131 −0.0327 0.0033 0.0002 S7 −10.152 0.028 −0.4038 1.2639 −2.2626 2.4845 −1.6998 0.7029 −0.16 0.0153 S8 1.7534 −0.0643 0.1117 −0.3935 0.7438 −0.8306 0.565 −0.2306 0.0519 −0.005 S9 −44.62 0.0891 −0.1333 0.115 −0.0807 0.043 −0.017 0.0044 −0.0006 4E−05 S10 −4.9001 0.0976 −0.137 0.0999 −0.0465 0.0132 −0.0022 0.0002 −1E−05 2E−07 S11 −13.159 0.0954 −0.1535 0.1202 −0.0703 0.0264 −0.006 0.0008 −6E−05 2E−06 S12 0.7792 −0.0211 −0.0288 0.0188 −0.0093 0.003 −0.0006 6E−05 −4E−06 9E−08 S13 −0.8786 −0.3003 0.0918 −0.0015 −0.0073 0.0023 −0.0004 3E−05 −1E−06 3E−08 S14 −1.3086 −0.2504 0.1203 −0.0427 0.0114 −0.0021 0.0003 −2E−05   9E−07 −2E−08 

Thirteenth Example

FIG. 25 is a view illustrating a thirteenth example of an optical imaging system, and FIG. 26 illustrates aberration curves of the optical imaging system of FIG. 25 .

An optical imaging system 13 includes a first lens 1013, a second lens 2013, a third lens 3013, a fourth lens 4013, a fifth lens 5013, a sixth lens 6013, and a seventh lens 7013.

The first lens 1013 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2013 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3013 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4013 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5013 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6013 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6013. The seventh lens 7013 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7013, and one inflection point is formed on the image-side surface of the seventh lens 7013.

The optical imaging system 13 further includes a stop, a filter 8013, and an image sensor 9013. The stop is disposed between the second lens 2013 and the third lens 3013 to adjust an amount of light incident on the image sensor 9013. The filter 8013 is disposed between the seventh lens 7013 and the image sensor 9013 to block infrared rays. The image sensor 9013 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 25 , the stop is disposed at a distance of 1.2052 mm from the object-side surface of the first lens 1013 toward the imaging plane of the optical imaging system 13. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 13 listed in Table 57 that appears later in this application.

Table 25 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 25 , and Table 26 below shows aspherical surface coefficients of the lenses of FIG. 25 .

TABLE 25 Sur- Thick- Effective face Radius of ness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1 First  2.3421801 0.35 1.546 56.114 1.570 S2 Lens  2.4608227 0.130273 1.582 S3 Second  2.309069 0.7 1.546 56.114 1.578 S4 Lens 38.833557 0.025 1.553 S5 (Stop)  7.6526629 0.25298 1.679 19.236 1.474 S6 Third  3.3272174 0.504716 1.325 Lens S7 Fourth  5.6743754 0.346649 1.679 19.236 1.461 S8 Lens  6.5811075 0.40646 1.563 S9 Fifth  4.7925509 0.35 1.546 56.114 1.772 S10 Lens 10.114446 0.527822 2.209 S11 Sixth  6.1622692 0.43 1.679 19.236 2.238 S12 Lens  3.9299512 0.26246 2.557 S13 Seventh  1.9665801 0.564397 1.546 56.114 3.026 S14 Lens  1.490457 0.226843 3.262 S15 Filter Infinity 0.11 1.518 64.197 3.641 S16 Infinity 0.797349 3.681 S17 Imaging Infinity 0.015 4.171 Plane

TABLE 26 K A B C D E F G H J S1 −1 −0.0146 0.01 −0.0522 0.0643 −0.0468 0.0217 −0.0061 0.0009 −6E−05  S2 −9.9316 0.0529 −0.0805 0.0187 0.0015 0.0183 −0.0206 0.0089 −0.0018 0.0001 S3 −0.3035 −0.0312 0.1094 −0.2703 0.3068 −0.1783 0.0505 −0.0026 −0.0019 0.0003 S4 42.587 −0.14 0.5905 −1.3419 1.845 −1.6056 0.8858 −0.299 0.0561 −0.0045 S5 14.878 −0.1698 0.5798 −1.2212 1.6455 −1.4398 0.807 −0.2778 0.0533 −0.0044 S6 2.4782 −0.0974 0.3302 −0.8477 1.4713 −1.6606 1.1916 −0.5238 0.1288 −0.0136 S7 −10.89 −0.0126 −0.1352 0.3555 −0.5088 0.426 −0.2043 0.0479 −0.0019 −0.0008 S8 2.4559 −0.0438 −0.0219 −0.0159 0.1351 −0.2288 0.1952 −0.0929 0.0235 −0.0025 S9 −44.519 0.0902 −0.1408 0.1256 −0.0754 0.0253 −0.0032 −0.0008 0.0003 −3E−05  S10 2.7864 0.0708 −0.1198 0.1033 −0.057 0.0193 −0.004 0.0005 −3E−05 9E−07 S11 −17.823 0.0653 −0.1084 0.075 −0.0394 0.0131 −0.0026 0.0003 −2E−05 5E−07 S12 0.5903 −0.0273 −0.0096 0.0039 −0.0025 0.001 −0.0002 2E−05 −1E−06 3E−08 S13 −0.8439 −0.2851 0.1057 −0.0237 0.0034 −0.0003 5E−07 2E−06 −1E−07 4E−09 S14 −1.3672 −0.238 0.119 −0.0473 0.0138 −0.0027 0.0003 −3E−05   1E−06 −2E−08 

Fourteenth Example

FIG. 27 is a view illustrating a fourteenth example of an optical imaging system, and FIG. 28 illustrates aberration curves of the optical imaging system of FIG. 27 .

An optical imaging system 14 includes a first lens 1014, a second lens 2014, a third lens 3014, a fourth lens 4014, a fifth lens 5014, a sixth lens 6014, and a seventh lens 7014.

The first lens 1014 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2014 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3014 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4014 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5014 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The sixth lens 6014 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6014. The seventh lens 7014 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7014.

The optical imaging system 14 further includes a stop, a filter 8014, and an image sensor 9014. The stop is disposed in front of the first lens 1014 to adjust an amount of light incident on the image sensor 9014. The filter 8014 is disposed between the seventh lens 7014 and the image sensor 9014 to block infrared rays. The image sensor 9014 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 27 , the stop is disposed at a distance of 0.2500 mm from the object-side surface of the first lens 1014 toward the imaging plane of the optical imaging system 14. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 14 listed in Table 57 that appears later in this application.

Table 27 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 27 , and Table 28 below shows aspherical surface coefficients of the lenses of FIG. 27 .

TABLE 27 Thick- Effective Surface Radius of ness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1 (Stop) 1.7211 0.6349 1.544 56.114 1.100 S2 First 11.4571 0.1212 1.071 Lens S3 Second 119.1721 0.2033 1.661 20.353 1.057 S4 Lens 4.4758 0.0843 1.043 S5 Third 4.5258 0.3109 1.544 56.114 1.051 S6 Lens 20.6082 0.2158 1.015 S7 Fourth 13.2152 0.2369 1.544 56.114 1.019 S8 Lens 16.2733 0.2103 1.070 S9 Fifth −6.5732 0.4119 1.651 21.494 1.076 S10 Lens −10.4553 0.3710 1.320 S11 Sixth 3.4779 0.6318 1.544 56.114 1.556 S12 Lens 3.1994 0.2672 2.337 S13 Seventh 2.8804 0.5060 1.544 56.114 2.489 S14 Lens 1.7054 0.1384 2.666 S15 Filter Infinity 0.2100 3.102 S16 Infinity 0.5794 3.177 S17 Imaging Infinity 0.0106 3.529 Plane

TABLE 28 K A B C D E F G H S1 0.0432 −0.0088 0.0131 −0.0627 0.1199 −0.1345 0.077 −0.018 −0.0004 S2 −26.097 −0.0562 0.051 −0.0514 0.0595 −0.0683 0.0462 −0.0139 −7E−05  S3 −99 −0.1283 0.1953 −0.2779 0.5135 −0.8812 0.9662 −0.5723 0.1395 S4 −16.567 −0.0971 0.1552 −0.3608 0.985 −2.059 2.5647 −1.6683 0.4378 S5 −1.6774 −0.0377 0.065 −0.4515 1.687 −3.5163 4.2391 −2.6607 0.6752 S6 57.913 −0.0559 0.0533 −0.341 1.3373 −2.8539 3.4811 −2.2114 0.5781 S7 −66.305 −0.1749 −0.0635 0.0963 −0.2061 0.5819 −0.9 0.6874 −0.1979 S8 19.549 −0.1228 −0.0686 0.0207 0.1647 −0.2695 0.1725 −0.0616 0.0161 S9 29.709 −0.0709 0.0826 −0.3062 0.6009 −0.6459 0.3344 −0.0761 0 S10 −31.338 −0.1255 0.1076 −0.1494 0.1908 −0.1423 0.0506 −0.0065 0 S11 −46.453 0.0038 −0.1455 0.1534 −0.126 0.0705 −0.0225 0.0029 0 S12 −31.504 0.0093 −0.0326 0.0149 −0.0033 0.0003 −1E−05 −7E−07 0 S13 −0.5233 −0.2947 0.1709 −0.0627 0.0154 −0.0025 0.0003 −1E−05 3E−07 S14 −0.8257 −0.2584 0.1353 −0.0565 0.0166 −0.0032 0.0004 −3E−05 7E−07

Fifteenth Example

FIG. 29 is a view illustrating a fifteenth example of an optical imaging system, and FIG. 30 illustrates aberration curves of the optical imaging system of FIG. 29 .

An optical imaging system 15 includes a first lens 1015, a second lens 2015, a third lens 3015, a fourth lens 4015, a fifth lens 5015, a sixth lens 6015, and a seventh lens 7015.

The first lens 1015 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2015 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3015 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4015 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. The fifth lens 5015 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The sixth lens 6015 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6015. The seventh lens 7015 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7015.

The optical imaging system 15 further includes a stop, a filter 8015, and an image sensor 9015. The stop is disposed between the first lens 1015 and the second lens 2015 to adjust an amount of light incident on the image sensor 9015. The filter 8015 is disposed between the seventh lens 7015 and the image sensor 9015 to block infrared rays. The image sensor 9015 forms an imaging plane on which an image of a subject is formed.

Table 29 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 29 , and Table 30 below shows aspherical surface coefficients of the lenses of FIG. 29 .

TABLE 29 Sur- Thick- Effective face Radius of ness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1 First 1.7773 0.6238 1.544 56.114 1.217 S2 Lens 6.4566 0.1000 1.158 (Stop) S3 Second 4.4103 0.2363 1.661 20.353 1.157 S4 Lens 2.6584 0.4138 1.184 S5 Third 6.5879 0.4640 1.544 56.114 1.177 S6 Lens 10.5233 0.1777 1.282 S7 Fourth 13.4749 0.3627 1.544 56.114 1.306 S8 Lens −20.2300 0.2325 1.444 S9 Fifth −3.1831 0.2000 1.661 20.353 1.456 S10 Lens −4.2151 0.1000 1.625 S11 Sixth 6.7646 0.6089 1.544 56.114 2.207 S12 Lens −2.8792 0.4211 2.145 S13 Seventh −6.9958 0.3200 1.544 56.114 2.280 S14 Lens 1.6934 0.1485 3.165 S15 Filter Infinity 0.1100 2.850 S16 Infinity 0.7007 2.888 S17 Imaging Infinity −0.0200   3.276 Plane

TABLE 30 K A B C D E F G H J S1 −0.5383 0.0108 0.0209 −0.0477 0.0729 −0.06 0.0243 −0.0027 −0.0007 0 S2 5.8135 −0.0459 0.0189 0.0248 −0.0559 0.0486 −0.026 0.0094 −0.0019 0 S3 −10.011 −0.085 0.066 0.02 −0.0808 0.0756 −0.0332 0.0069 −0.0006 0 S4 −0.1875 −0.0544 0.0068 0.26 −0.6655 0.9329 −0.7519 0.3313 −0.061 0 S5 0 −0.0569 0.0063 −0.0275 −0.0046 0.0401 −0.0485 0.0264 −0.0053 0 S6 0 −0.0775 −0.0976 0.271 −0.5329 0.5567 −0.3323 0.1128 −0.0176 0 S7 47.015 −0.0863 −0.1024 0.2298 −0.2721 0.1091 0.0392 −0.0378 0.0065 0 S8 −99 −0.0603 −0.0348 0.057 −0.0468 0.0241 −0.007 0.001 −6E−05 0 S9 −99 −0.2672 0.6153 −0.9745 0.9138 −0.5236 0.1786 −0.0332 0.0026 0 S10 −0.0701 0.0268 −0.0377 −0.0253 0.035 −0.0133 0.0024 −0.0002  7E−06 0 S11 −97.721 0.1556 −0.2109 0.1424 −0.0678 0.02 −0.0033 0.0003 −1E−05 0 S12 −1.5998 0.2298 −0.1811 0.0905 −0.0342 0.0088 −0.0014 0.0001 −4E−06 0 S13 4.8341 −0.1142 −0.0024 0.0306 −0.013 0.0027 −0.0003  2E−05 −5E−07 0 S14 −1.0993 −0.2618 0.1449 −0.0599 0.0171 −0.0032 0.0004 −3E−05  1E−06 −2E−08

Sixteenth Example

FIG. 31 is a view illustrating a sixteenth example of an optical imaging system, and FIG. 32 illustrates aberration curves of the optical imaging system of FIG. 31 .

An optical imaging system 16 includes a first lens 1016, a second lens 2016, a third lens 3016, a fourth lens 4016, a fifth lens 5016, a sixth lens 6016, and a seventh lens 7016.

The first lens 1016 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2016 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3016 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4016 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5016 has a positive refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The sixth lens 6016 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6016. The seventh lens 7016 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, no inflection point is formed on the object-side surface of the seventh lens 7016, and one inflection point is formed on the image-side surface of the seventh lens 7016.

The optical imaging system 16 further includes a stop, a filter 8016, and an image sensor 9016. The stop is disposed between the first lens 1016 and the second lens 2016 to adjust an amount of light incident on the image sensor 9016. The filter 8016 is disposed between the seventh lens 7016 and the image sensor 9016 to block infrared rays. The image sensor 9016 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 31 , the stop is disposed at a distance of 0.6409 mm from the object-side surface of the first lens 1016 toward the imaging plane of the optical imaging system 16. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 16 listed in Table 57 that appears later in this application.

Table 31 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 31 , and Table 32 below shows aspherical surface coefficients of the lenses of FIG. 31 .

TABLE 31 Thick- Effective Surface Radius of ness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1 First 1.7977 0.6409 1.544 56.114 1.270 S2 Lens 3.7422 0.1191 1.211 (Stop) S3 Second 3.0573 0.2200 1.661 20.353 1.190 S4 Lens 2.7951 0.3931 1.130 S5 Third 10.6215 0.4640 1.544 56.114 1.153 S6 Lens 9.0266 0.1000 1.289 S7 Fourth 7.9876 0.3621 1.544 56.114 1.328 S8 Lens 138.7678 0.2334 1.454 S9 Fifth −4.1765 0.2198 1.661 20.353 1.518 S10 Lens −4.1394 0.1000 1.656 S11 Sixth 4.6134 0.6089 1.544 56.114 2.000 S12 Lens −3.5921 0.4726 2.038 S13 Seventh −7.0016 0.3200 1.544 56.114 2.049 S14 Lens 1.6938 0.1107 2.685 S15 Filter Infinity 0.2100 2.942 S16 Infinity 0.5300 3.008 S17 Imaging Infinity 0.0200 3.292 Plane

TABLE 32 K A B C D E F G H J S1 −0.812 0.0136 0.0311 −0.0769 0.1226 −0.1099 0.0531 −0.0116 0.0005 0 S2 −6.6917 −0.0631 0.0174 0.0714 −0.1648 0.1763 −0.1086 0.0376 −0.0059 0 S3 −14.579 −0.0707 0.0068 0.1319 −0.2129 0.173 −0.0715 0.0127 −0.0005 0 S4 −0.188 −0.0614 −0.0138 0.3338 −0.7392 0.9251 −0.6781 0.276 −0.0477 0 S5 0 −0.0572 0.0435 −0.1733 0.2724 −0.2421 0.0931 −0.0042 −0.0038 0 S6 0 −0.1356 −0.0309 0.2183 −0.5547 0.6931 −0.486 0.1856 −0.0304 0 S7 30.023 −0.2107 0.0007 0.1568 −0.2854 0.2586 −0.1154 0.0236 −0.0019 0 S8 −99 −0.1858 −0.0192 0.2616 −0.4111 0.3392 −0.1538 0.0357 −0.0033 0 S9 −98.995 −0.2935 0.5043 −0.5157 0.2657 −0.0658 0.0056 0.0005 −8E−05 0 S10 −0.0701 −0.0775 0.2223 −0.2703 0.1529 −0.0452 0.0073 −0.0006  2E−05 0 S11 −97.878 0.1479 −0.1956 0.1288 −0.0598 0.0172 −0.0028 0.0002 −8E−06 0 S12 1.4166 0.1234 −0.1416 0.087 −0.0341 0.0088 −0.0014 0.0001 −4E−06 0 S13 9.5503 −0.2864 0.1096 0.0149 −0.0214 0.0064 −0.0009  6E−05 −2E−06 0 S14 −1.2786 −0.3076 0.1777 −0.0626 0.0143 −0.0022 0.0002 −1E−05  5E−07 −7E−09

Seventeenth Example

FIG. 33 is a view illustrating a seventeenth example of an optical imaging system, and FIG. 34 illustrates aberration curves of the optical imaging system of FIG. 33 .

An optical imaging system 17 includes a first lens 1017, a second lens 2017, a third lens 3017, a fourth lens 4017, a fifth lens 5017, a sixth lens 6017, and a seventh lens 7017.

The first lens 1017 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2017 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3017 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4017 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. The fifth lens 5017 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The sixth lens 6017 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6017. The seventh lens 7017 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7017.

The optical imaging system 17 further includes a stop, a filter 8017, and an image sensor 9017. The stop is disposed between the second lens 2017 and the third lens 3017 to adjust an amount of light incident on the image sensor 9017. The filter 8017 is disposed between the seventh lens 7017 and the image sensor 9017 to block infrared rays. The image sensor 9017 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 33 , the stop is disposed at a distance of 0.6811 mm from the object-side surface of the first lens 1017 toward the imaging plane of the optical imaging system 17. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 17 listed in Table 57 that appears later in this application.

Table 33 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 33 , and Table 34 below shows aspherical surface coefficients of the lenses of FIG. 33 .

TABLE 33 Thick- Effective Surface Radius of ness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1 First 1.5114 0.4703 1.547 56.114 1.072 S2 Lens 6.0961 0.0200 1.048 S3 Second 1.7572 0.1895 1.660 20.400 0.992 S4 Lens 1.2936 0.3871 0.909 (Stop) S5 Third 3.5767 0.1000 1.660 20.400 0.903 S6 Lens 3.3323 0.2006 0.933 S7 Fourth 8.9505 0.6399 1.547 56.114 1.084 S8 Lens −56.3031 0.3491 1.273 S9 Fifth −8.7735 0.1490 1.650 21.494 1.334 S10 Lens −11.1487 0.0575 1.573 S11 Sixth 4.0153 0.5539 1.650 21.494 1.601 S12 Lens 3.7824 0.2451 1.999 S13 Seventh 1.9199 0.5114 1.537 55.711 2.819 S14 Lens 1.4533 0.1829 2.581 S15 Filter Infinity 0.1100 2.895 S16 Infinity 0.5173 2.935 S17 Imaging Infinity 0.0150 3.262 Plane

TABLE 34 K A B C D E F G H J S1 −0.0872 0.0085 0.0157 −0.0318 0.0507 −0.0457 0.0214 −0.0042 0 0 S2 25.924 −0.1035 0.4079 −0.9853 1.3538 −1.1103 0.5053 −0.1003 0 0 S3 −2.0252 −0.1329 0.5024 −1.13 1.5305 −1.218 0.5394 −0.1043 0 0 S4 −0.1481 −0.094 0.1762 −0.1747 −0.0182 0.4162 −0.4298 0.1625 0 0 S5 0.829 −0.1421 0.1795 −0.2535 0.4392 −0.4879 0.3327 −0.0954 0 0 S6 6.8952 −0.1777 0.1545 −0.1149 0.1034 −0.051 0.0095 −0.0002 0 0 S7 21.918 −0.0605 0.0485 −0.0459 0.0715 −0.0485 0.0135 −0.0013 0 0 S8 25.736 −0.0682 0.0239 −0.012 0.0083 −0.0027 0.0004 −2E−05 0 0 S9 1.6857 −0.1292 0.2433 −0.407 0.387 −0.2241 0.0741 −0.011 0 0 S10 43.884 −0.107 0.1148 −0.1454 0.095 −0.0303 0.0045 −0.0003 0 0 S11 −52.836 0.0701 −0.2199 0.2058 −0.1343 0.0526 −0.0106 0.0009 0 0 S12 0 −0.0577 −0.027 0.0237 −0.0104 0.0019 0.0002 −0.0001 2E−05 −6E−07 S13 −0.9427 −0.3217 0.0977 −0.0029 −0.0058 0.0017 −0.0002  2E−05 −4E−07  0 S14 −1.0048 −0.2798 0.1282 −0.0461 0.0122 −0.0022 0.0002 −1E−05 4E−07 0

Eighteenth Example

FIG. 35 is a view illustrating an eighteenth example of an optical imaging system, and FIG. 36 illustrates aberration curves of the optical imaging system of FIG. 35 .

An optical imaging system 18 includes a first lens 1018, a second lens 2018, a third lens 3018, a fourth lens 4018, a fifth lens 5018, a sixth lens 6018, and a seventh lens 7018.

The first lens 1018 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2018 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3018 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4018 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5018 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6018 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6018. The seventh lens 7018 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7018.

The optical imaging system 18 further includes a stop, a filter 8018, and an image sensor 9018. The stop is disposed between the second lens 2018 and the third lens 3018 to adjust an amount of light incident on the image sensor 9018. The filter 8018 is disposed between the seventh lens 7018 and the image sensor 9018 to block infrared rays. The image sensor 9018 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 35 , the stop is disposed at a distance of 1.0512 mm from the object-side surface of the first lens 1018 toward the imaging plane of the optical imaging system 18. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 18 listed in Table 57 that appears later in this application.

Table 35 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 35 , and Table 36 below shows aspherical surface coefficients of the lenses of FIG. 35 .

TABLE 35 Thick- Effective Surface Radius of ness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1 First 1.8221 0.5822 1.544 56.114 1.275 S2 Lens 4.8276 0.0564 1.231 S3 Second 4.5461 0.3826 1.544 56.114 1.199 S4 Lens 15.5127 0.0300 1.152 S5 (Stop) 3.9113 0.2000 1.661 20.350 1.086 S6 Third 2.2301 0.3911 1.050 Lens S7 Fourth 14.8039 0.3510 1.544 56.114 1.050 S8 Lens 6.0045 0.0516 1.178 S9 Fifth 4.0426 0.2943 1.639 21.525 1.235 S10 Lens 6.0069 0.3029 1.433 S11 Sixth 50.3009 0.5717 1.544 56.114 1.650 S12 Lens −1.4551 0.3562 2.029 S13 Seventh −3.9227 0.3400 1.544 56.114 2.473 S14 Lens 1.8149 0.1800 2.629 S15 Filter Infinity 0.2100 1.518 64.197 S16 Infinity 0.6200 S17 Imaging Infinity 0.0200 Plane

TABLE 36 K A B C D E F G H S1 −1.7971 0.02 0.0153 −0.0575 0.0794 −0.0689 0.0296 −0.0048 0 S2 0 −0.0249 −0.1102 0.1727 −0.1632 0.1101 −0.0441 0.0076 0 S3 0 0.0215 −0.1293 0.2068 −0.2278 0.2 −0.1022 0.0204 0 S4 72.117 −0.0714 0.2664 −0.6184 0.7522 −0.5313 0.203 −0.0324 0 S5 −15.337 −0.2046 0.4728 −0.8108 0.9542 −0.6926 0.2852 −0.0496 0 S6 −5.3786 −0.102 0.2031 −0.1151 −0.1096 0.3352 −0.285 0.0916 0 S7 0 −0.0443 −0.0061 −0.1088 0.0952 −0.0067 −0.0694 0.0382 0 S8 0 −0.1919 0.079 0.0071 −0.1552 0.1775 −0.0954 0.0212 0 S9 −54.709 −0.2046 −0.0908 0.3474 −0.3213 0.1526 −0.0388 0.0033 0 S10 0 −0.1486 −0.156 0.3054 −0.2298 0.1087 −0.0342 0.0052 0 S11 0 0.0817 −0.1186 −0.0496 0.1291 −0.0835 0.0241 −0.0026 0 S12 −1.7559 0.2122 −0.171 0.0184 0.0388 −0.0196 0.0037 −0.0003 0 S13 −4.6993 0.0063 −0.2121 0.1837 −0.071 0.0154 −0.0019 0.0001 −4E−06 S14 −1.1263 −0.2142 0.0916 −0.0298 0.0072 −0.0012 0.0001 −9E−06  3E−07

Nineteenth Example

FIG. 37 is a view illustrating a nineteenth example of an optical imaging system, and FIG. 38 illustrates aberration curves of the optical imaging system of FIG. 37 .

An optical imaging system 19 includes a first lens 1019, a second lens 2019, a third lens 3019, a fourth lens 4019, a fifth lens 5019, a sixth lens 6019, and a seventh lens 7019.

The first lens 1019 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2019 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3019 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4019 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5019 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6019 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6019. The seventh lens 7019 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, one inflection point is formed on the object-side surface of the seventh lens 7019, and two inflection points are formed on the image-side surface of the seventh lens 7019.

The optical imaging system 19 further includes a stop, a filter 8019, and an image sensor 9019. The stop is disposed between the first lens 1019 and the second lens 2019 to adjust an amount of light incident on the image sensor 9019. The filter 8019 is disposed between the seventh lens 7019 and the image sensor 9019 to block infrared rays. The image sensor 9019 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 37 , the stop is disposed at a distance of 0.3740 mm from the object-side surface of the first lens 1019 toward the imaging plane of the optical imaging system 19. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 19 listed in Table 57 that appears later in this application.

Table 37 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 37 , and Table 38 below shows aspherical surface coefficients of the lenses of FIG. 37 .

TABLE 37 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1  First 2.1873 0.3243 1.546 56.114 1.450 S2  Lens 1.8391 0.0497 1.441 S3  (Stop) 1.6361 0.7740 1.546 56.114 1.415 S4  Second 30.6063 0.0300 1.354 Lens S5  Third 7.2628 0.2100 1.678 19.236 1.270 S6  Lens 2.9652 0.4149 1.120 S7  Fourth 14.3312 0.3269 1.645 23.528 1.182 S8  Lens 12.1292 0.2502 1.337 S9  Fifth 2.1804 0.2500 1.645 23.528 1.580 S10 Lens 2.1733 0.3831 1.892 S11 Sixth 8.6678 0.6610 1.546 56.114 2.429 S12 Lens −1.9375 0.3110 2.544 S13 Seventh −7.6533 0.3650 1.546 56.114 2.916 S14 Lens 1.6261 0.2200 3.075 S15 Filter Infinity 0.1100 1.518 64.166 3.378 S16 Infinity 0.6351 3.414 S17 Imaging Infinity 0.0049 3.763 Plane

TABLE 38 K A B C D E F G H S1  −3.7488 0.0012 −0.0066 −0.0004 −0.0198 0.0252 −0.0132 0.0034 −0.0004 S2  −7.1577 −0.061 −0.0104 0.0163 0.0115 −0.0163 0.0063 −0.0009 0 S3  −2.6408 −0.0742 0.0698 −0.0582 0.0727 −0.0412 0.0034 0.0048 −0.0013 S4  −99 −0.0752 0.197 −0.3925 0.5174 −0.4377 0.2286 −0.0663 0.008 S5  0 −0.1076 0.2644 −0.4642 0.6109 −0.5485 0.3128 −0.0997 0.0134 S6  4.364 −0.0584 0.0882 −0.068 −0.0405 0.1629 −0.1817 0.0962 −0.0201 S7  0 −0.0603 0.0743 −0.2389 0.4197 −0.4882 0.353 −0.1472 0.0274 S8  0 −0.1174 0.165 −0.2983 0.348 −0.2864 0.1556 −0.0507 0.0077 S9  −15.429 −0.0562 0.0005 0.0397 −0.0576 0.0355 −0.0117 0.0015 3E−05 S10 −9.1654 −0.1003 0.0623 −0.0379 0.0141 −0.0032 5E−05 0.0002 −3E−05   S11 0 −0.001 −0.0216 0.0157 −0.0111 0.0043 −0.0009 8E−05 −3E−06   S12 −1.7327 0.1074 −0.0935 0.0649 −0.0289 0.0078 −0.0012 0.0001 −4E−06   S13 0.6082 −0.1509 0.0462 0.0036 −0.0043 0.001 −0.0001 6E−06 −2E−07   S14 −8.5925 −0.0951 0.041 −0.0124 0.0026 −0.0004 4E−05 −2E−06   4E−08

Twentieth Example

FIG. 39 is a view illustrating a twentieth example of an optical imaging system, and FIG. 40 illustrates aberration curves of the optical imaging system of FIG. 39 .

An optical imaging system 20 includes a first lens 1020, a second lens 2020, a third lens 3020, a fourth lens 4020, a fifth lens 5020, a sixth lens 6020, and a seventh lens 7020.

The first lens 1020 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2020 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3020 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4020 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5020 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6020 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6020. The seventh lens 7020 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, one inflection point is formed on the object-side surface of the seventh lens 7020, and two inflection points are formed on the image-side surface of the seventh lens 7020.

The optical imaging system 20 further includes a stop, a filter 8020, and an image sensor 9020. The stop is disposed between the first lens 1020 and the second lens 2020 to adjust an amount of light incident on the image sensor 9020. The filter 8020 is disposed between the seventh lens 7020 and the image sensor 9020 to block infrared rays. The image sensor 9020 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 39 , the stop is disposed at a distance of 1.0601 mm from the object-side surface of the first lens 1020 toward the imaging plane of the optical imaging system 20. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 20 listed in Table 57 that appears later in this application.

Table 39 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 39 , and Table 40 below shows aspherical surface coefficients of the lenses of FIG. 39 .

TABLE 39 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1  First 2.0122 1.0601 1.546 56.114 1.510 S2  Lens 5.8868 0.0711 1.375 (Stop) S3  Second 5.4922 0.2000 1.677 19.238 1.353 S4  Lens 3.7029 0.2969 1.240 S5  Third 9.9760 0.3703 1.546 56.114 1.270 S6  Lens 29.4320  0.1826 1.356 S7  Fourth 8.6841 0.2108 1.667 20.377 1.355 S8  Lens 6.0112 0.2603 1.479 S9  Fifth 5.7445 0.2195 1.619 25.960 1.750 S10 Lens 5.0434 0.3482 1.736 S11 Sixth 4.8476 0.9335 1.546 56.114 2.400 S12 Lens −1.7967   0.3268 2.438 S13 Seventh −1.9512   0.3000 1.546 56.114 2.692 S14 Lens 2.8062 0.1700 3.158 S15 Filter Infinity 0.2100 1.518 64.197 3.744 S16 Infinity 0.6441 3.826 S17 Imaging Infinity −0.0041   4.252 Plane

TABLE 40 K A B C D E F G H J S1  −1.1332 0.0154 0.0091 −0.0108 0.01 −0.0053 0.0015 −0.0002 −1E−05   0 S2  12.901 −0.0771 0.0315 0.036 −0.0911 0.0858 −0.0454 0.0132 −0.0016 0 S3  9.6379 −0.1255 0.0603 0.0962 −0.2261 0.222 −0.1214 0.036 −0.0045 0 S4  −0.8719 −0.061 0.0524 0.0027 0.0041 −0.069 0.0931 −0.0498 0.0101 0 S5  0 −0.0121 0.0151 −0.088 0.1573 −0.1697 0.1016 −0.0315 0.004 0 S6  −99 −0.0237 −0.0073 0.0365 −0.1182 0.1732 −0.1421 0.0603 −0.0104 0 S7  0 −0.104 −0.0751 0.2741 −0.5665 0.6635 −0.4435 0.1557 −0.0222 0 S8  0 −0.1088 0.0332 −0.0258 −0.0057 0.0249 −0.0175 0.0048 −0.0003 0 S9  0 −0.1824 0.192 −0.1693 0.1022 −0.0423 0.0117 −0.002 0.0002 0 S10 −96.971 −0.1318 0.0661 −0.0223 −0.0048 0.0087 −0.0034 0.0006 −4E−05   0 S11 −34.065 −0.0075 −0.0001 −0.0106 0.0081 −0.0035 0.0008 −1E−04   4E−06 0 S12 −2.7443 0.1131 −0.0726 0.0291 −0.0078 0.0012 −9E−05   1E−06 1E−07 0 S13 −10.221 −0.0393 −0.0198 0.0148 −0.0036 0.0005 −3E−05   1E−06 −2E−08   0 S14 −1.2844 −0.0938 0.0319 −0.0092 0.002 −0.0003 4E−05 −3E−06   1E−07 −3E−09

Twenty-First Example

FIG. 41 is a view illustrating a twenty-first example of an optical imaging system, and FIG. 42 illustrates aberration curves of the optical imaging system of FIG. 41 .

An optical imaging system 21 includes a first lens 1021, a second lens 2021, a third lens 3021, a fourth lens 4021, a fifth lens 5021, a sixth lens 6021, and a seventh lens 7021.

The first lens 1021 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2021 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3021 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4021 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5021 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6021 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6021. The seventh lens 7021 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7021, and one inflection point is formed on the image-side surface of the seventh lens 7021.

The optical imaging system 21 further includes a stop, a filter 8021, and an image sensor 9021. The stop is disposed between the second lens 2021 and the third lens 3021 to adjust an amount of light incident on the image sensor 9021. The filter 8021 is disposed between the seventh lens 7021 and the image sensor 9021 to block infrared rays. The image sensor 9021 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 41 , the stop is disposed at a distance of 1.1280 mm from the object-side surface of the first lens 1021 toward the imaging plane of the optical imaging system 21. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 21 listed in Table 57 that appears later in this application.

Table 41 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 41 , and Table 42 below shows aspherical surface coefficients of the lenses of FIG. 41 .

TABLE 41 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1  First 2.1378 0.4606 1.546 56.114 1.360 S2  Lens 2.7210 0.0424 1.346 S3  Second 2.7717 0.6000 1.546 56.114 1.322 S4  Lens 33.8379 0.0250 1.253 S5  (Stop) 5.9058 0.2300 1.679 19.236 1.199 S6  Third 2.9580 0.3150 1.193 Lens S7  Fourth 6.7061 0.5156 1.546 56.114 1.246 S8  Lens 15.6197 0.4883 1.350 S9  Fifth 9.4476 0.3912 1.679 19.236 1.600 S10 Lens 5.2667 0.1323 2.100 S11 Sixth 2.4900 0.4534 1.546 56.114 1.951 S12 Lens 2.6058 0.1501 2.440 S13 Seventh 1.4290 0.5074 1.546 56.114 2.691 S14 Lens 1.2861 0.4042 2.841 S15 Filter Infinity 0.2100 1.518 64.197 3.245 S16 Infinity 0.6767 3.316 S17 Imaging Infinity 0.0150 3.733 Plane

TABLE 42 K A B C D E F G H J S1  −0.9855 −0.0214 0.0439 −0.0925 0.0633 0.0064 −0.0479 0.0372 −0.0126 0.0016 S2  −12.849 0.0234 −0.0441 −0.1546 −0.0352 0.7096 −1.0004 0.6322 −0.1959 0.0242 S3  −1.1002 −0.0276 0.0854 −0.4269 0.4011 0.3152 −0.8128 0.5995 −0.2021 0.0266 S4  −7.367 −0.1684 1.4677 −5.7804 12.64 −16.742 13.734 −6.8183 1.8769 −0.22 S5  9.3187 −0.2245 1.5162 −5.8569 13.059 −17.823 15.121 −7.7778 2.2231 −0.2714 S6  1.6265 −0.0856 0.2704 −0.9806 2.415 −3.7649 3.6777 −2.1905 0.7327 −0.1058 S7  −4.7815 0.0264 −0.5178 1.9131 −4.2532 5.8667 −5.0521 2.6239 −0.7455 0.0886 S8  5.8592 −0.0338 −0.0317 0.0097 0.0291 −0.0644 0.0612 −0.0311 0.0084 −0.0008 S9  −43.521 −0.002 −0.0021 0.0436 −0.1236 0.1389 −0.0871 0.0311 −0.0059 0.0005 S10 −12.729 −0.0608 0.0286 0.0052 −0.0244 0.0182 −0.0074 0.0018 −0.0002 1E−05 S11 −16.199 0.1227 −0.2762 0.2845 −0.2154 0.1043 −0.0311 0.0056 −0.0006 2E−05 S12 0.0242 −0.0902 0.058 −0.0568 0.029 −0.0088 0.0017 −0.0002 2E−05 −5E−07   S13 −0.8394 −0.4114 0.2062 −0.0647 0.0137 −0.0021 0.0003 −2E−05 2E−06 −5E−08   S14 −1.3743 −0.2983 0.1734 −0.0777 0.0258 −0.006 0.0009 −9E−05 5E−06 −1E−07  

Twenty-Second Example

FIG. 43 is a view illustrating a twenty-second example of an optical imaging system, and FIG. 44 illustrates aberration curves of the optical imaging system of FIG. 43 .

An optical imaging system 22 includes a first lens 1022, a second lens 2022, a third lens 3022, a fourth lens 4022, a fifth lens 5022, a sixth lens 6022, and a seventh lens 7022.

The first lens 1022 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2022 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is convex. The third lens 3022 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4022 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5022 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6022 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6022. The seventh lens 7022 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7022.

The optical imaging system 22 further includes a stop, a filter 8022, and an image sensor 9022. The stop is disposed between the second lens 2022 and the third lens 3022 to adjust an amount of light incident on the image sensor 9022. The filter 8022 is disposed between the seventh lens 7022 and the image sensor 9022 to block infrared rays. The image sensor 9022 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 43 , the stop is disposed at a distance of 1.2251 mm from the object-side surface of the first lens 1022 toward the imaging plane of the optical imaging system 22. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 22 listed in Table 57 that appears later in this application.

Table 43 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 43 , and Table 44 below shows aspherical surface coefficients of the lenses of FIG. 43 .

TABLE 43 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1  First 2.2670 0.4000 1.546 56.114 1.380 S2  Lens 2.6691 0.0251 1.337 S3  Second 2.6238 0.8000 1.546 56.114 1.337 S4  Lens −11.8758 0.0250 1.298 (Stop) S5  Third 19.0032 0.2526 1.679 19.236 1.202 S6  Lens 4.0676 0.4108 1.242 S7  Fourth 6.6991 0.3500 1.679 19.236 1.265 S8  Lens 7.2200 0.4296 1.369 S9  Fifth 21.5310 0.3500 1.546 56.114 1.600 S10 Lens 7.8918 0.0250 1.853 S11 Sixth 2.5030 0.4300 1.546 56.114 1.908 S12 Lens 2.4093 0.2399 2.372 S13 Seventh 1.3275 0.5254 1.546 56.114 2.507 S14 Lens 1.1947 0.3215 2.738 S15 Filter Infinity 0.2100 1.518 64.197 3.205 S16 Infinity 0.6902 3.285 S17 Imaging Infinity 0.0150 3.781 Plane

TABLE 44 K A B C D E F G H J S1  −1 0.0012 −0.0631 0.0884 −0.0759 −0.0183 0.0824 −0.0602 0.019 −0.0023 S2  −11.056 0.038 0.1354 −0.9871 1.5641 −1.0995 0.3265 0.0108 −0.0287 0.0048 S3  −0.7436 −0.0807 0.579 −1.9725 2.9346 −2.2115 0.8223 −0.0859 −0.0317 0.0076 S4  −7.2488 −0.1245 0.5877 −1.6544 2.8953 −3.2415 2.3118 −1.0127 0.2473 −0.0257 S5  12.337 −0.1601 0.4751 −0.9119 1.1418 −0.9059 0.4213 −0.0904 −0.0021 0.0031 S6  −0.7614 −0.0925 0.1749 −0.2349 0.2283 −0.1666 0.0772 −0.0124 −0.0054 0.0021 S7  −12.018 0.047 −0.734 2.692 −5.8982 8.0627 −6.9318 3.6331 −1.0592 0.1316 S8  5.8397 −0.055 0.0238 −0.178 0.4679 −0.6732 0.5802 −0.2983 0.0845 −0.0101 S9  −43.467 0.0208 −0.0298 0.0644 −0.1157 0.1018 −0.0488 0.0125 −0.0016 7E−05 S10 −10.152 −0.0392 0.0146 0.0256 −0.0749 0.0675 −0.0305 0.0074 −0.0009 5E−05 S11 −16.19 0.0915 −0.1594 0.2045 −0.2282 0.1461 −0.0541 0.0117 −0.0014 7E−05 S12 −0.0871 −0.1985 0.3277 −0.3309 0.1866 −0.0647 0.0141 −0.0019 0.0001 −4E−06   S13 −0.8728 −0.462 0.2873 −0.1331 0.0447 −0.0104 0.0016 −0.0002 9E−06 −2E−07   S14 −1.5388 −0.3036 0.1844 −0.0807 0.0232 −0.0042 0.0005 −3E−05 1E−06 −1E−08  

Twenty-Third Example

FIG. 45 is a view illustrating a twenty-third example of an optical imaging system, and FIG. 46 illustrates aberration curves of the optical imaging system of FIG. 45 .

An optical imaging system 23 includes a first lens 1023, a second lens 2023, a third lens 3023, a fourth lens 4023, a fifth lens 5023, a sixth lens 6023, and a seventh lens 7023.

The first lens 1023 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2023 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3023 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4023 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5023 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6023 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6023. The seventh lens 7023 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7023, and one inflection point is formed on the image-side surface of the seventh lens 7023.

The optical imaging system 23 further includes a stop, a filter 8023, and an image sensor 9023. The stop is disposed between the second lens 2023 and the third lens 3023 to adjust an amount of light incident on the image sensor 9023. The filter 8023 is disposed between the seventh lens 7023 and the image sensor 9023 to block infrared rays. The image sensor 9023 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 45 , the stop is disposed at a distance of 0.9515 mm from the object-side surface of the first lens 1023 toward the imaging plane of the optical imaging system 23. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 23 listed in Table 57 that appears later in this application.

Table 45 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 45 , and Table 46 below shows aspherical surface coefficients of the lenses of FIG. 45 .

TABLE 45 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1  First 1.7473 0.6964 1.546 56.114 1.280 S2  Lens 9.4084 0.0250 1.247 S3  Second 2.9766 0.2300 1.667 20.353 1.150 S4  Lens 1.9564 0.3428 1.007 (Stop) S5  Third 16.8676 0.2300 1.667 20.353 1.032 S6  Lens 16.0126 0.0294 1.089 S7  Fourth 7.3144 0.3570 1.546 56.114 1.130 S8  Lens 17.3919 0.3708 1.228 S9  Fifth 11.5617 0.3608 1.656 21.525 1.317 S10 Lens 6.9184 0.2917 1.657 S11 Sixth −97.1635 0.5908 1.656 21.525 1.878 S12 Lens 17.2767 0.0301 2.338 S13 Seventh 1.9322 0.8258 1.546 56.114 2.961 S14 Lens 1.7390 0.2207 3.015 S15 Filter Infinity 0.2100 1.518 64.197 3.305 S16 Infinity 0.6356 3.375 S17 Imaging Infinity 0.0143 3.731 Plane

TABLE 46 K A B C D E F G H J S1  −0.3029 0.0003 0.0248 −0.0645 0.0887 −0.0757 0.0373 −0.0109 0.0014 0 S2  0.9997 −0.0385 0.0595 −0.0639 0.0052 0.0552 −0.0624 0.0296 −0.0054 0 S3  −1.759 −0.0559 0.0769 −0.084 0.0959 −0.0711 0.0309 −0.0026 −0.0012 0 S4  −0.2233 −0.022 −0.0153 0.1358 −0.2648 0.3311 −0.2167 0.051 0.0098 0 S5  −0.8179 −0.0092 −0.0103 −0.1607 0.6303 −1.1881 1.2746 −0.7449 0.1847 0 S6  −0.0005 0.02 −0.1312 0.1142 −0.0014 0.0632 −0.1761 0.1336 −0.0335 0 S7  −31.717 0.0266 −0.0935 −0.0104 0.2126 −0.2049 0.0541 0.02 −0.0098 0 S8  −1.0151 −0.0315 0.0288 −0.0714 0.0935 −0.1394 0.1768 −0.1344 0.0524 −0.0076 S9  0.382 −0.1094 0.0327 −0.0826 0.2138 −0.3162 0.2427 −0.0962 0.0156 0 S10 −27.524 −0.0394 −0.117 0.1628 −0.1238 0.0551 −0.0144 0.0023 −0.0002 0 S11 23.203 0.1802 −0.2793 0.2208 −0.1258 0.0475 −0.0113 0.0016 −0.0001 0 S12 −49.948 0.0336 −0.0362 0.0098 −0.0011 −0.0001 8E−05 −1E−05   6E−07 0 S13 −1.8504 −0.2437 0.1076 −0.031 0.0066 −0.001 0.0001 −6E−06   1E−07 0 S14 −0.8299 −0.173 0.0629 −0.0196 0.0044 −0.0006 6E−05 −3E−06   6E−08 0

Twenty-Fourth Example

FIG. 47 is a view illustrating a twenty-fourth example of an optical imaging system, and FIG. 48 illustrates aberration curves of the optical imaging system of FIG. 47 .

An optical imaging system 24 includes a first lens 1024, a second lens 2024, a third lens 3024, a fourth lens 4024, a fifth lens 5024, a sixth lens 6024, and a seventh lens 7024.

The first lens 1024 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2024 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3024 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4024 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5024 has a positive refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The sixth lens 6024 has a positive refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6024. The seventh lens 7024 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, no inflection point is formed on the object-side surface of the seventh lens 7024, and one inflection point is formed on the image-side surface of the seventh lens 7024.

The optical imaging system 24 further includes a stop, a filter 8024, and an image sensor 9024. The stop is disposed between the first lens 1024 and the second lens 2024 to adjust an amount of light incident on the image sensor 9024. The filter 8024 is disposed between the seventh lens 7024 and the image sensor 9024 to block infrared rays. The image sensor 9024 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 47 , the stop is disposed at a distance of 0.8574 mm from the object-side surface of the first lens 1024 toward the imaging plane of the optical imaging system 24. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 24 listed in Table 57 that appears later in this application.

Table 47 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 47 , and Table 48 below shows aspherical surface coefficients of the lenses of FIG. 47 .

TABLE 47 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1  First 1.8263 0.7034 1.546 56.114 1.290 S2  Lens 7.7056 0.1540 1.215 S3  (Stop) 4.6213 0.2200 1.679 19.236 1.127 S4  Second 2.7291 0.3146 1.109 Lens S5  Third 6.6824 0.4391 1.546 56.114 1.151 S6  Lens 11.7185 0.1811 1.250 S7  Fourth 6.8604 0.2500 1.679 19.236 1.259 S8  Lens 7.4620 0.4065 1.408 S9  Fifth −9.8497 0.5939 1.546 56.114 1.604 S10 Lens −1.8870 0.0250 1.970 S11 Sixth −41.8807 0.3701 1.546 56.114 2.299 S12 Lens −3.7454 0.2569 2.568 S13 Seventh −2.0634 0.3200 1.546 56.114 2.855 S14 Lens 2.6116 0.1554 3.055 S15 Filter Infinity 0.2100 1.518 64.197 3.346 S16 Infinity 0.6400 3.410 S17 Imaging Infinity 0.0100 3.730 Plane

TABLE 48 K A B C D E F G H J S1  −1.0945 0.0136 0.0506 −0.1839 0.416 −0.5839 0.51 −0.2705 0.0795 −0.01 S2  3.251 −0.0482 0.0508 −0.085 0.2198 −0.436 0.5133 −0.3477 0.1258 −0.0189 S3  −13.699 −0.1155 0.1942 −0.4376 1.335 −2.7707 3.4839 −2.5718 1.0289 −0.1723 S4  −4.0179 −0.0945 0.2406 −0.7546 2.4023 −4.9111 6.1463 −4.5679 1.8552 −0.3168 S5  −6.6783 −0.0675 0.1229 −0.5308 1.3347 −2.1668 2.2329 −1.4059 0.4923 −0.0729 S6  2.6687 −0.1089 0.0811 −0.1248 0.0166 0.1977 −0.3307 0.2573 −0.1017 0.0162 S7  7.0258 −0.2027 0.0564 −0.0521 0.0446 −0.0418 0.0403 −0.0212 0.001 0.0016 S8  −10.8 −0.1484 0.0297 −0.0692 0.1666 −0.2292 0.2033 −0.1109 0.0326 −0.0038 S9  −26.465 0.0072 −0.0015 −0.1473 0.2748 −0.3047 0.2171 −0.0939 0.0219 −0.0021 S10 −1.4915 0.1141 −0.2124 0.1883 −0.1127 0.0475 −0.0129 0.0021 −0.0002 6E−06 S11 −6.8308 0.0507 −0.1087 0.0643 −0.0416 0.0215 −0.0064 0.0011 −9E−05   3E−06 S12 −10.262 0.0544 0.062 −0.1082 0.0705 −0.0254 0.0054 −0.0007 4E−05 −1E−06   S13 −6.0066 0.0037 −0.0456 0.0731 −0.0405 0.0115 −0.0019 0.0002 −9E−06   2E−07 S14 −0.8095 −0.1128 0.0401 −0.0105 0.0011 0.0002 −7E−05   8E−06 −5E−07   1E−08

Twenty-Fifth Example

FIG. 49 is a view illustrating a twenty-fifth example of an optical imaging system, and FIG. 50 illustrates aberration curves of the optical imaging system of FIG. 49 .

An optical imaging system 25 includes a first lens 1025, a second lens 2025, a third lens 3025, a fourth lens 4025, a fifth lens 5025, a sixth lens 6025, and a seventh lens 7025.

The first lens 1025 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2025 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3025 has a positive refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The fourth lens 4025 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5025 has a positive refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The sixth lens 6025 has a positive refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6025. The seventh lens 7025 has a negative refractive power, and an object-side surface thereof is concave and an image-side surface thereof is concave. In addition, no inflection point is formed on the object-side surface of the seventh lens 7025, and one inflection point is formed on the image-side surface of the seventh lens 7025.

The optical imaging system 25 further includes a stop, a filter 8025, and an image sensor 9025. The stop is disposed between the second lens 2025 and the third lens 3025 to adjust an amount of light incident on the image sensor 9025. The filter 8025 is disposed between the seventh lens 7025 and the image sensor 9025 to block infrared rays. The image sensor 9025 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 49 , the stop is disposed at a distance of 0.8722 mm from the object-side surface of the first lens 1025 toward the imaging plane of the optical imaging system 25. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 25 listed in Table 57 that appears later in this application.

Table 49 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 49 , and Table 50 below shows aspherical surface coefficients of the lenses of FIG. 49 .

TABLE 49 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1  First 1.7603 0.6172 1.546 56.114 1.100 S2  Lens 14.1233 0.0250 1.040 S3  Second 5.8341 0.2300 1.667 20.353 1.011 S4  Lens 3.1227 0.3733 0.919 (Stop) S5  Third −49.9417 0.3799 1.546 56.114 0.995 S6  Lens −15.1870 0.1809 1.096 S7  Fourth 23.3680 0.3032 1.667 20.353 1.124 S8  Lens 12.2098 0.3354 1.309 S9  Fifth −4.3948 0.4729 1.546 56.114 1.471 S10 Lens −1.5983 0.0250 1.698 S11 Sixth −6.0815 0.5447 1.546 56.114 1.822 S12 Lens −3.0145 0.2724 2.192 S13 Seventh −6.1494 0.4224 1.546 56.114 2.462 S14 Lens 1.6367 0.1933 2.880 S15 Filter Infinity 0.2100 1.518 64.197 3.223 S16 Infinity 0.6445 3.300 S17 Imaging Infinity 0.0099 3.728 Plane

TABLE 50 K A B C D E F G H J S1  −1.0054 0.0225 0.0222 −0.0696 0.1604 −0.2238 0.1806 −0.0791 0.0141 0 S2  −1.5097 −0.1275 0.3975 −0.6982 0.6801 −0.322 0.0288 0.029 −0.0076 0 S3  6.0294 −0.163 0.4504 −0.8514 1.0525 −0.8203 0.4235 −0.138 0.0213 0 S4  −0.8846 −0.0449 0.0393 0.1574 −0.6934 1.3171 −1.3069 0.6799 −0.143 0 S5  0 −0.0513 −0.0193 −0.016 0.0043 0.0034 −0.0155 0.0319 −0.0128 0 S6  0 −0.1089 −0.0569 0.3576 −0.9255 1.1947 −0.8604 0.3322 −0.0547 0 S7  −7.5 −0.2139 −0.0107 0.1788 −0.1827 −0.1159 0.3046 −0.1897 0.0405 0 S8  −43.341 −0.1402 −0.061 0.2777 −0.4123 0.3523 −0.1857 0.0564 −0.0071 0 S9  −35.081 −0.0602 0.0736 −0.1046 0.1084 −0.0726 0.0255 −0.0041 0.0002 0 S10 −1.5734 0.1621 −0.2197 0.1896 −0.107 0.0396 −0.0091 0.0011 −6E−05   0 S11 0.5153 0.2137 −0.3167 0.2399 −0.1217 0.0384 −0.0069 0.0007 −3E−05   0 S12 −1.1466 0.1967 −0.2565 0.1542 −0.0532 0.0115 −0.0015 0.0001 −4E−06   0 S13 −0.9056 −0.0077 −0.2094 0.1883 −0.0749 0.0167 −0.0022 0.0002 −5E−06   0 S14 −1.2797 −0.2192 0.1006 −0.0338 0.0088 −0.0018 0.0003 −2E−05   1E−06 −3E−08

Twenty-Sixth Example

FIG. 51 is a view illustrating a twenty-sixth example of an optical imaging system, and FIG. 52 illustrates aberration curves of the optical imaging system of FIG. 51 .

An optical imaging system 26 includes a first lens 1026, a second lens 2026, a third lens 3026, a fourth lens 4026, a fifth lens 5026, a sixth lens 6026, and a seventh lens 7026.

The first lens 1026 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2026 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3026 has a positive refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The fourth lens 4026 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5026 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6026 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6026. The seventh lens 7026 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7026, and one inflection point is formed on the image-side surface of the seventh lens 7026.

The optical imaging system 26 further includes a stop, a filter 8026, and an image sensor 9026. The stop is disposed between the second lens 2026 and the third lens 3026 to adjust an amount of light incident on the image sensor 9026. The filter 8026 is disposed between the seventh lens 7026 and the image sensor 9026 to block infrared rays. The image sensor 9026 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 51 , the stop is disposed at a distance of 0.8664 mm from the object-side surface of the first lens 1026 toward the imaging plane of the optical imaging system 26. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 26 listed in Table 57 that appears later in this application.

Table 51 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 51 , and Table 52 below shows aspherical surface coefficients of the lenses of FIG. 51 .

TABLE 51 Effective Surface Radius of Thickness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1  First 1.8830 0.5872 1.546 56.114 1.050 S2  Lens 18.0733 0.0492 0.962 S3  Second 4.5995 0.2300 1.667 20.353 0.934 Lens S4  (Stop) 2.5464 0.3929 0.837 S5  Third −21.7546 0.2745 1.546 56.114 1.100 S6  Lens −13.5144 0.0611 1.106 S7  Fourth 25.3349 0.2655 1.546 56.114 1.200 S8  Lens 25.3360 0.3710 1.285 S9  Fifth 9.4682 0.3930 1.656 21.525 1.500 S10 Lens 5.1029 0.3790 1.754 S11 Sixth 6.4162 0.8885 1.546 56.114 2.041 S12 Lens 6.3521 0.0460 2.631 S13 Seventh 1.9665 0.8854 1.536 55.656 3.050 S14 Lens 1.7699 0.3098 3.456 S15 Filter Infinity 0.2100 1.518 64.197 3.768 S16 Infinity 0.6537 3.829 S17 Imaging Infinity −0.0037   4.129 Plane

TABLE 52 K A B C D E F G H J S1 −0.1525 0.0035 0.0054 −0.0238 0.0587 −0.0925 0.0808 −0.0376 0.0069 0 S2 −36.188 −0.0554 0.191 −0.4954 0.9092 −1.1194 0.849 −0.3546 0.0617 0 S3 −0.1164 −0.0883 0.2264 −0.5273 0.9947 −1.274 1.0104 −0.4343 0.076 0 S4 0.3326 −0.0462 0.097 −0.2316 0.5455 −0.848 0.7854 −0.3759 0.0708 0 S5 51.758 −0.0119 −0.0911 0.3617 −0.9067 1.3845 −1.3014 0.6835 −0.1493 0 S6 42.164 0.0924 −0.5269 1.3558 −2.2584 2.5093 −1.8107 0.7611 −0.139 0 S7 −4.7579 0.1336 −0.5938 1.261 −1.8115 1.7924 −1.1666 0.4427 −0.0728 0 S8 −3.4393 0.0471 −0.1842 0.2886 −0.3575 0.3273 −0.1971 0.067 −0.0093 0 S9 −8.5449 −0.0502 −0.0588 0.1599 −0.2027 0.1398 −0.0542 0.0105 −0.0007 0 S10 −18.064 −0.044 −0.0734 0.1425 −0.1303 0.0691 −0.0217 0.0038 −0.0003 0 S11 −4.6497 0.0633 −0.1193 0.0882 −0.0426 0.0135 −0.0028 0.0004 −2E−05 0 S12 −50 0.034 −0.0497 0.0246 −0.0072 0.0013 −0.0001 7E−06 −2E−07 0 S13 −2.4291 −0.1201 0.0167 0.0022 −0.0009 0.0001 −6E−06 1E−07  9E−10 0 S14 −1.0032 −0.1111 0.0248 −0.0032 −0.0001 0.0001 −2E−05 2E−06 −8E−08 1E−09

Twenty-Seventh Example

FIG. 53 is a view illustrating a twenty-seventh example of an optical imaging system, and FIG. 54 illustrates aberration curves of the optical imaging system of FIG. 53 .

An optical imaging system 27 includes a first lens 1027, a second lens 2027, a third lens 3027, a fourth lens 4027, a fifth lens 5027, a sixth lens 6027, and a seventh lens 7027.

The first lens 1027 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2027 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3027 has a positive refractive power, and an object-side surface thereof is concave and an image-side surface thereof is convex. The fourth lens 4027 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5027 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6027 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6027. The seventh lens 7027 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, two inflection points are formed on the object-side surface of the seventh lens 7027, and one inflection point is formed on the image-side surface of the seventh lens 7027.

The optical imaging system 27 further includes a stop, a filter 8027, and an image sensor 9027. The stop is disposed between the second lens 2027 and the third lens 3027 to adjust an amount of light incident on the image sensor 9027. The filter 8027 is disposed between the seventh lens 7027 and the image sensor 9027 to block infrared rays. The image sensor 9027 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 53 , the stop is disposed at a distance of 0.9037 mm from the object-side surface of the first lens 1027 toward the imaging plane of the optical imaging system 27. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 27 listed in Table 57 that appears later in this application.

Table 53 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 53 , and Table 54 below shows aspherical surface coefficients of the lenses of FIG. 53 .

TABLE 53 Sur- Thick- Effective face Radius of ness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1 First 1.8987 0.6486 1.546 56.114 1.260 S2 Lens 7.3568 0.0250 1.216 S3 Second 3.8789 0.2300 1.667 20.353 1.161 S4 Lens 2.7620 0.3408 1.053 (Stop) S5 Third −50.1242 0.2819 1.546 56.114 1.120 S6 Lens −14.9889 0.0597 1.158 S7 Fourth 12.0498 0.2698 1.546 56.114 1.220 S8 Lens 12.5657 0.2919 1.320 S9 Fifth 9.5926 0.3500 1.667 20.353 1.520 S10 Lens 5.2748 0.3344 1.762 S11 Sixth 6.8735 0.8484 1.546 56.114 2.052 S12 Lens 7.4933 0.0591 2.641 S13 Seventh 2.0337 0.8836 1.536 55.656 3.070 S14 Lens 1.8436 0.3048 3.425 S15 Filter Infinity 0.2100 1.518 64.197 3.764 S16 Infinity 0.6441 3.825 S17 Imaging Infinity 0.0150 4.134 Plane

TABLE 54 K A B C D E F G H J S1 −0.1061 −0.0082 0.0469 −0.0925 0.0811 −0.0129 −0.032 0.0224 −0.0047 0 S2 −36.188 −0.0502 0.1624 −0.4029 0.6931 −0.7643 0.5021 −0.1789 0.0264 0 S3 0.0036 −0.0795 0.2057 −0.548 1.0742 −1.291 0.9097 −0.3412 0.052 0 S4 0.4038 −0.0325 0.0884 −0.3009 0.7004 −0.9194 0.6738 −0.2424 0.0308 0 S5 51.758 0.0055 −0.1746 0.5018 −0.9395 1.1442 −0.9144 0.4407 −0.0937 0 S6 42.164 0.0953 −0.4992 1.0397 −1.2284 0.8169 −0.2802 0.0384  4E−06 0 S7 −4.7579 0.1185 −0.4938 0.8554 −0.8643 0.5167 −0.185 0.0417 −0.0054 0 S8 −3.4393 0.0492 −0.194 0.3147 −0.3773 0.3249 −0.1878 0.063 −0.0088 0 S9 −8.5449 −0.0638 0.0289 −0.0884 0.1649 −0.171 0.0983 −0.0306 0.0041 0 S10 −18.064 −0.0543 −0.0172 0.0321 −0.0179 0.004  5E−06 −0.0001  8E−06 0 S11 −4.6497 0.0535 −0.0909 0.0613 −0.0311 0.011 −0.0026 0.0004 −2E−05 0 S12 −50 0.0103 −0.0176 0.0057 −0.0015 0.0003 −4E−05  2E−06 −6E−08 0 S13 −2.606 −0.1177 0.0192 −0.0004 −1E−04 −1E−05  4E−06 −4E−07  9E−09 0 S14 −1.0102 −0.0979 0.0187 −0.0024 0.0001  2E−05 −6E−06  6E−07 −3E−08 6E−10

Twenty-Eighth Example

FIG. 55 is a view illustrating a twenty-eighth example of an optical imaging system, and FIG. 56 illustrates aberration curves of the optical imaging system of FIG. 55 .

An optical imaging system 28 includes a first lens 1028, a second lens 2028, a third lens 3028, a fourth lens 4028, a fifth lens 5028, a sixth lens 6028, and a seventh lens 7028.

The first lens 1028 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The second lens 2028 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The third lens 3028 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fourth lens 4028 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The fifth lens 5028 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. The sixth lens 6028 has a positive refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, at least one inflection point is formed on either one or both of the object-side surface and the image-side surface of the sixth lens 6028. The seventh lens 7028 has a negative refractive power, and an object-side surface thereof is convex and an image-side surface thereof is concave. In addition, one inflection point is formed on each of the object-side surface and the image-side surface of the seventh lens 7028.

The optical imaging system 28 further includes a stop, a filter 8028, and an image sensor 9028. The stop is disposed between the second lens 2028 and the third lens 3028 to adjust an amount of light incident on the image sensor 9028. The filter 8028 is disposed between the seventh lens 7028 and the image sensor 9028 to block infrared rays. The image sensor 9028 forms an imaging plane on which an image of a subject is formed. Although not illustrated in FIG. 55 , the stop is disposed at a distance of 1.2500 mm from the object-side surface of the first lens 1028 toward the imaging plane of the optical imaging system 28. This distance is equal to TTL-SL and can be calculated from the values of TTL and SL for Example 28 listed in Table 57 that appears later in this application.

Table 55 below shows physical properties of the lenses and other elements of the optical imaging system of FIG. 55 , and Table 56 below shows aspherical surface coefficients of the lenses of FIG. 55 .

TABLE 55 Sur- Thick- Effective face Radius of ness/ Index of Abbe Aperture No. Element Curvature Distance Refraction Number Radius S1 First 2.2813 0.4941 1.546 56.114 1.640 S2 Lens 2.7190 0.1308 1.629 S3 Second 2.7090 0.6000 1.546 56.114 1.595 S4 Lens 37.2451 0.0250 1.593 S5 (Stop) 11.0960 0.2300 1.679 19.236 1.522 S6 Third 4.3260 0.4820 1.450 Lens S7 Fourth 8.7091 0.3517 1.656 21.525 1.514 S8 Lens 14.9889 0.4926 1.555 S9 Fifth 5.3406 0.4257 1.679 19.236 1.840 S10 Lens 2.9721 0.1952 2.415 S11 Sixth 2.1211 0.5425 1.546 56.114 2.362 S12 Lens 4.9818 0.4212 2.717 S13 Seventh 2.4999 0.5046 1.546 56.114 3.169 S14 Lens 1.4794 0.2230 3.372 S15 Filter Infinity 0.2100 1.518 64.197 3.779 S16 Infinity 0.6566 3.848 S17 Imaging Infinity 0.0150 4.210 Plane

TABLE 56 K A B C D E F G H J S1 −0.9867 −0.0114 0.0111 −0.0538 0.0917 −0.0925 0.0542 −0.0183 0.0033 −0.0003 S2 −12.035 0.0479 −0.173 0.2637 −0.3194 0.2597 −0.1301 0.0386 −0.0062 0.0004 S3 −0.9455 −0.0107 −0.0528 0.1054 −0.1922 0.2187 −0.1388 0.0499 −0.0096 0.0008 S4 3.0384 −0.0418 0.2162 −0.5714 0.8143 −0.6941 0.3642 −0.1154 0.0202 −0.0015 S5 10.164 −0.0842 0.2583 −0.5961 0.8439 −0.7413 0.4043 −0.1328 0.0241 −0.0018 S6 2.0809 −0.0648 0.1424 −0.2905 0.4095 −0.3776 0.2224 −0.0802 0.0163 −0.0014 S7 −13.097 −0.0215 −0.0518 0.145 −0.2583 0.2777 −0.1843 0.0733 −0.0157 0.0014 S8 5.8592 −0.0435 0.0377 −0.0856 0.1074 −0.0887 0.0479 −0.0161 0.0031 −0.0003 S9 −43.521 −0.0279 0.0228 0.0104 −0.0468 0.0468 −0.0253 0.0078 −0.0013  9E−05 S10 −17.628 −0.0671 0.0426 −0.0048 −0.0103 0.0068 −0.0022 0.0004 −4E−05  1E−06 S11 −9.8081 0.0426 −0.1025 0.0919 −0.0514 0.0177 −0.0039 0.0006 −5E−05  2E−06 S12 −0.0695 0.0048 −0.0496 0.0379 −0.0164 0.004 −0.0005  4E−05 −8E−07 −1E−08 S13 −0.6908 −0.2261 0.0409 0.0129 −0.0077 0.0017 −0.0002  1E−05 −6E−07  1E−08 S14 −1.419 −0.2123 0.0904 −0.0281 0.0063 −0.001 9E−05 −6E−06  2E−07 −2E−09

Table 57 below shows an overall focal length f of the optical imaging system, an overall length TTL of the optical imaging system (a distance from the object-side surface of the first lens to the imaging plane), a distance SL from the stop to the imaging plane, an f-number (F No.) of the optical imaging system (the overall focal length f of the optical imaging system divided by the diameter of an entrance pupil of the optical imaging system, where both f and the diameter of the entrance pupil are expressed in mm), an image height (IMG HT) on the imaging plane (one-half of a diagonal length of the imaging plane), and a field of view (FOV) of the optical imaging system for each of Examples 1-28 described herein. The values of f, TTL, SL, and IMG HT are expressed in mm. The values of F No. are dimensionless values. The values of FOV are expressed in degrees.

TABLE 57 IMG Example f TTL SL F No. HT FOV f134567 1 4.8480 6.000  5.0965 1.540  4.000  77.800   3.4441 2 4.2829 5.1899 3.9385 1.5853 3.6900 79.815 −23.2030 3 4.7800 5.8272 4.4022 1.5729 4.0500 79.019 −42.8744 4 3.9500 4.8189 3.6503 1.5808 3.2500 77.470 −30.5480 5 4.3500 5.3000 4.9170 1.5800 3.3844 79.580  −5.2273 6 4.2800 5.1000 4.3688 1.7100 3.5352 77.840   2.7518 7 4.4011 5.3000 4.1423 1.6897 3.7280 79.310 −26.4128 8 4.5110 5.4999 4.4199 1.6585 3.7280 77.849 392.6438 9 4.5442 5.5000 4.4233 1.6724 3.7280 77.539 −58.4566 10 4.8227 5.8648 4.6866 1.6639 3.7280 73.384  89.9938 11 4.5369 5.5000 4.2704 1.5688 3.7280 77.565 −21.5648 12 4.8309 5.9552 4.7759 1.6624 4.1280 79.742 −11.9581 13 5.0858 5.9999 4.7947 1.5909 4.1280 76.863  −8.3987 14 4.4468 5.1439 4.8939 2.0717 3.5280 75.627   2.5748 15 4.4000 5.2000 1.8078 3.2610 72.552   3.0701 16 3.9935 5.1246 4.4837 1.5723 3.2610 77.383   3.8824 17 3.9200 4.7000 4.0189 1.8300 3.2610 78.330   2.7493 18 4.0052 4.9400 3.8888 1.5800 3.2260 76.500   6.5989 19 4.3329 5.3200 4.9460 1.4980 3.7520 80.300  −5.0314 20 4.7371 5.8000 4.7399 1.5686 4.2500 82.209   3.7697 21 4.5877 5.6173 4.4893 1.6867 3.7280 76.901 −157.3713 22 4.4980 5.5000 4.2749 1.6297 3.7280 78.012  −9.9003 23 4.5861 5.4613 4.5098 1.7914 3.7280 76.963   3.1230 24 4.3158 5.2500 4.3926 1.6913 3.7280 80.429   3.0710 25 4.3017 5.2400 4.3678 1.9545 3.7280 80.465   3.0059 26 4.9659 5.9933 5.1269 2.3647 4.1280 78.448   3.1668 27 4.6674 5.7971 4.8934 1.8451 4.1280 81.802   3.6413 28 4.8700 6.0000 4.7500 1.4848 4.2000 80.288 −23.7892

Table 58 below shows in mm a focal length f1 of the first lens, a focal length f2 of the second lens, a focal length f3 of the third lens, a focal length f4 of the fourth lens, a focal length f5 of the fifth lens, a focal length f6 of the sixth lens, and a focal length f7 of the seventh lens for each of Examples 1-28 described herein.

TABLE 58 Example f1 f2 f3 f4 f5 f6 f7 1 4.699 −11.772 21.070 −38.885 −12.922 2.771 −2.453 2 9.5890 4.5406 −6.9872 17555492 558.7000 −30.322 1998.195 3 10.0345 5.2922 −7.6128 22346862 86.5836 −27.728 146.074 4 8.4094 4.3550 −6.5204 −4512 74.3686 −22.452 1842.731 5 −64.2326 3.2480 −7.4275 −43.7223 52.4247 3.010 −2.424 6 3.5960 −7.3490 −1245.24 15.6567 −19.7232 2.662 −2.171 7 9.9516 4.9854 −9.0419 −60.9593 28.4615 −19.130 −36.205 8 12.2172 6.0167 −9.9247 25.3582 28.7232 −32.884 −16.737 9 13.4191 5.6271 −8.9208 16.1417 −36.7578 29.873 −12.281 10 13.6636 6.5561 −11.4351 32.2946 28.3279 −36.885 −22.967 11 17.0122 4.9962 −9.0344 25.7533 24.3015 −79.899 −10.773 12 32.0696 4.9582 −9.5104 22.5720 16.1804 −12.867 −20.135 13 43.5223 4.4621 −8.8732 52.4923 16.2883 −17.315 −19.385 14 3.6264 −6.9779 10.5508 125.3810 −28.1554 −367.720 −9.031 15 4.2900 −10.6063 30.9779 14.8711 −21.1331 3.784 −2.465 16 5.6767 −73.5511 −122.7160 15.5097 207.3750 3.799 −2.466 17 3.5400 −8.7600 −87.3600 14.1800 −64.1800 −799.990 −18.040 18 5.0178 11.6357 −8.1681 −18.7682 18.1322 2.601 −2.226 19 −31.5304 3.1365 −7.5452 −130.0329 80.8864 2.966 −2.423 20 5.1067 −17.5830 27.4583 −30.2565 −75.8106 2.526 −2.062 21 14.2697 5.4868 −9.0060 21.0725 −18.2040 43.002 92.362 22 20.3702 4.0105 −7.6691 107.4534 −23.0047 189.703 54.850 23 3.8083 −9.4079 −530.7502 22.8366 −27.1051 −22.324 66.015 24 4.2066 −10.3310 27.6314 107.6478 4.1658 7.509 −2.062 25 3.6197 −10.4284 39.8209 −38.7622 4.3417 10.303 −2.323 26 3.8015 −8.9549 64.5946 12384.8 −17.5030 299.093 57.797 27 4.4990 −15.6740 39.0579 453.7793 −18.1602 102.612 59.134 28 18.5366 5.3131 −10.5800 30.6731 −10.6364 6.334 −8.036

Table 59 below shows in mm a thickness (DedgeT) of an edge of the first lens, a thickness (L2edgeT) of an edge of the second lens, a thickness (L3edgeT) of an edge of the third lens, a thickness (L4edgeT) of an edge of the fourth lens, a thickness (L5edgeT) of an edge of the fifth lens, a thickness (L6edgeT) of an edge of the sixth lens, and a thickness (L7edgeT) of an edge of the seventh lens for each of Examples 1-28 described herein.

TABLE 59 Example L1edgeT L2edgeT L3edgeT L4edgeT L5edgeT L6edgeT L7edgeT 1 0.2527 0.3544 0.2546 0.3479 0.2843 0.2558 0.8308 2 0.2513 0.2829 0.3599 0.2195 0.2899 0.3277 0.3914 3 0.2822 0.3127 0.4160 0.2370 0.3248 0.3709 0.3823 4 0.2327 0.2588 0.3335 0.2027 0.2718 0.3298 0.3765 5 0.2200 0.2700 0.3480 0.2240 0.2590 0.2690 0.4370 6 0.2216 0.3773 0.2347 0.2401 0.1894 0.2600 0.3234 7 0.2568 0.2552 0.3401 0.2756 0.3650 0.3065 0.2776 8 0.2535 0.2550 0.4864 0.2519 0.3609 0.4901 0.4086 9 0.2497 0.2500 0.4399 0.2704 0.3183 0.6519 0.2941 10 0.2855 0.3362 0.4980 0.2610 0.4273 0.4966 0.4889 11 0.2582 0.2578 0.4040 0.2530 0.4107 0.2818 0.4636 12 0.2479 0.3333 0.3826 0.3612 0.5824 0.3553 0.6406 13 0.2542 0.1246 0.4252 0.2768 0.3797 0.4611 0.3277 14 0.2688 0.3078 0.1901 0.2300 0.4099 0.7139 0.3000 15 0.2048 0.4069 0.2010 0.3332 0.2778 0.3483 0.8151 16 0.2180 0.3468 0.2110 0.2593 0.2768 0.2512 0.9497 17 0.1000 0.2800 0.1200 0.4200 0.1600 0.4100 0.5800 18 0.2320 0.2180 0.3500 0.2220 0.2410 0.3730 0.3970 19 0.2203 0.2484 0.3500 0.2373 0.2517 0.2418 0.5401 20 0.4351 0.3299 0.2145 0.3306 0.1429 0.2681 0.5558 21 0.2502 0.3421 0.3843 0.4086 0.2945 0.7273 0.2827 22 0.2675 0.3957 0.3836 0.4004 0.2278 0.5887 0.3421 23 0.2307 0.2892 0.2545 0.2544 0.3605 0.4762 0.6576 24 0.2501 0.3506 0.2323 0.3110 0.3641 0.3267 0.3719 25 0.2520 0.2935 0.2377 0.3745 0.2580 0.4152 0.6857 26 0.2927 0.2979 0.2516 0.2513 0.4092 0.7155 0.6778 27 0.2463 0.2800 0.2542 0.2728 0.3562 0.6300 0.6917 28 0.2515 0.1596 0.4288 0.3024 0.4301 0.3912 0.4326

Table 60 below shows in mm a sag (L5S1 sag) of an object-side surface of the fifth lens, a sag (L5S2 sag) of an image-side surface of the fifth lens, a thickness (Yc71P1) of the seventh lens at a first inflection point on the object-side surface of the seventh lens, a thickness (Yc71P2) of the seventh lens at a second inflection point on the object-side surface of the seventh lens, a thickness (Yc72P1) of the seventh lens at a first inflection point on the image-side surface of the seventh lens, and a thickness (Yc72P2) of the seventh lens at a second inflection point on the image-side surface of the seventh lens for each of Examples 1-28 described herein.

TABLE 60 Exam- L5S2 ple L5S1 sag sag Yc71P1 Yc71P2 Yc72P1 Yc72P2 1 −0.4639 −0.4961 1.3100 — 0.9900 — 2 0.1069 0.1580 0.5970 0.6980 0.6920 — 3 0.1973 0.1988 0.6780 0.8030 0.7950 — 4 0.2004 0.2021 0.5680 0.6700 0.6670 — 5 0.1154 0.1393 0.9300 — 0.8110 — 6 −0.4658 −0.5261 2.9330 — 4.1420 — 7 0.2103 0.2454 0.5690 0.6410 0.6700 — 8 0.1024 0.1416 0.5620 — 0.6860 — 9 0.1850 0.2667 0.5270 0.4850 0.6470 — 10 0.0544 0.0531 0.6070 — 0.7170 — 11 0.1496 0.0888 0.5070 0.7380 0.6370 — 12 0.1290 0.0520 0.6280 0.9230 0.7900 — 13 0.0698 0.0604 0.6330 0.5190 0.7380 — 14 −0.2605 −0.2625 0.4730 — 0.6310 — 15 −0.4848 −0.4070 0.8900 — 0.9200 — 16 −0.4791 −0.4221 — — 0.7810 — 17 −0.4400 −0.4500 0.7300 — 1.1200 — 18 −0.3405 −0.5395 0.8247 — 0.7357 — 19 0.2023 0.2006 0.9670 — 0.5350 0.9040 20 0.3540 0.4306 1.0040 — 0.5110 0.9130 21 0.2211 0.3179 0.5700 0.4520 0.6330 — 22 0.1756 0.3016 0.5950 — 0.6720 — 23 0.2805 0.2808 0.8830 0.9150 0.9880 — 24 0.4949 0.7331 — — 0.7340 — 25 0.2760 0.5093 — — 0.9680 — 26 0.0918 0.1026 0.9550 1.1030 1.1280 — 27 0.1793 0.1731 0.9640 1.1140 1.1300 — 28 0.2606 0.2562 0.5870 — 0.7630 —

Table 61 below shows in mm an inner diameter of each of the first to seventh spacers for each of Examples 1-28 described herein. S1d is an inner diameter of the first spacer SP1, S2d is an inner diameter of the second spacer SP2, S3d is an inner diameter of the third spacer SP3, S4d is an inner diameter of the fourth spacer SP4, S5d is an inner diameter of the fifth spacer SP5, S6d is an inner diameter of the sixth spacer SP6, and S7d is an inner diameter of the seventh spacer SP7.

TABLE 61 Ex- am- ple S1d S2d S3d S4d S5d S6d S7d 1 2.8400 2.5300 2.8300 3.2900 4.3400 6.3100 — 2 1.3500 1.2300 1.1400 1.5300 2.0700 2.7800 — 3 1.5000 1.3400 1.3200 1.7200 2.3100 3.0300 — 4 1.2400 1.1500 1.0300 1.4800 1.9000 2.4600 — 5 1.3400 1.2300 1.0300 1.5000 1.9800 2.6600 — 6 2.3100 2.1600 2.5400 2.9400 4.0600 4.8400 5.12 7 2.5800 2.4000 2.4900 2.9700 4.1600 4.8900 5.51 8 2.5900 2.5000 2.5300 2.9000 3.8000 4.9000 — 9 2.6500 2.4600 2.3900 2.9000 3.8000 5.1500 — 10 2.7700 2.6100 2.7900 3.1200 4.0300 4.8900 — 11 2.8100 2.6300 2.6500 3.1200 4.0300 4.9100 — 12 2.8000 2.6500 2.7300 3.5400 3.4200 4.4400 5.74 13 3.1700 3.0000 2.7900 3.0800 4.1800 5.4900 — 14 2.1200 2.1000 2.0400 2.1200 2.8100 4.6400 — 15 2.3200 2.3600 2.5600 2.9300 3.7000 4.3500 — 16 2.4100 2.3000 2.6600 3.0300 3.7600 — — 17 2.1060 1.8860 2.0080 2.7000 3.0740 4.4840 — 18 2.4200 2.2300 2.0900 2.4700 3.2000 4.3300 — 19 2.8800 2.6300 2.2900 2.9300 4.3800 5.5100 — 20 2.6600 2.4700 X 3.1300 3.7800 5.1300 — 21 2.6700 2.5000 2.4400 2.9900 3.8000 5.2700 — 22 2.7100 2.5300 2.5200 3.0300 3.7800 4.8300 — 23 2.3600 2.0300 2.2500 2.6500 3.6400 5.1400 5.3  24 2.3300 2.2700 2.5300 3.1700 4.5200 5.3100 5.64 25 2.0600 1.8900 2.1500 2.7000 3.6100 4.5600 4.84 26 1.8900 1.8400 2.3300 2.7300 3.7300 5.4300 6.03 27 2.3900 2.1500 2.4000 2.8200 3.9400 5.6800 6.02 28 3.2200 3.1100 2.9200 3.2500 4.6000 5.6000 6.15

Table 62 below shows in mm³ a volume of each of the first to seventh lenses for each of Examples 1-28 described herein. L1v is a volume of the first lens, L2v is a volume of the second lens, L3v is a volume of the third lens, L4v is a volume of the fourth lens, L5v is a volume of the fifth lens, L6v is a volume of the sixth lens, and L7v is a volume of the seventh lens.

TABLE 62 Ex- am- ple L1v L2v L3v L4v L5v L6v L7v 1  9.4074 6.0389  7.8806 9.9733 14.2491 18.7217 48.3733 2  6.5805 7.1213  7.7660 6.6371 11.7744 12.5638 20.4308 3  8.0184 9.5628  9.6052 8.4128 12.0326 16.7196 28.0267 4  6.3442 6.9494  7.7597 6.2076  6.8959 10.3364 16.5597 5  5.7249 8.0179  8.3774 7.9589 10.3434 11.1031 27.1511 6  5.2342 5.0595  5.1455 4.1402  5.9856  8.1378 19.6812 7  5.6390 4.8580  6.6748 7.1627 11.0369 11.9357 27.1217 8  5.1778 5.1427  8.2986 6.3777 12.6369 14.9811 20.7310 9  5.1650 5.3015  6.2461 7.0472 12.2503 19.1335 17.9152 10  5.9227 6.9971  9.1275 7.0250 12.2307 15.4792 23.2093 11  6.0930 6.3798  6.8569 7.4035  9.7509 11.7344 23.4758 12  5.1989 7.9980  6.6804 7.9875 20.4160 20.0925 36.0790 13  6.7496 7.2862  8.8499 8.0745 13.4156 20.3714 25.3575 14  3.8115 4.6714  4.0552 5.0631 11.2844 25.7618 16.5646 15  4.2347 5.5368  5.5931 7.5471  9.4202  8.9992 27.3258 16  4.6529 4.6572  6.2312 6.7131 10.2673 11.7401 33.5372 17  2.5134 3.7749  2.3033 9.4226  4.0073 16.0487 22.2874 18  4.3198 3.6956  4.1821 5.1874  8.1714 10.5471 19.1646 19  5.6174 7.9604  6.8464 7.2237 12.5253 12.8147 28.5967 20 11.1287 6.0119  5.8018 9.6434  7.9251 20.0604 37.3066 21  5.0360 6.7314  5.9764 9.3728 10.4859 21.6926 17.1978 22  4.9598 8.1220  7.2222 8.2929  8.6024 18.8370 19.7464 23  5.4854 3.9796  4.1274 4.6927  9.8848 20.3357 35.3318 24  5.5446 5.0525  4.5199 5.6552  9.8279 14.9067 22.4415 25  3.8100 3.9751  3.9272 6.1885  7.5160 13.0347 31.8586 26  4.7517 4.3655  6.4562 5.0723  9.8674 36.8705 47.4701 27  5.6273 4.9490  5.1423 5.0791  9.3624 31.5832 47.9081 28  7.5192 7.1322 12.3605 9.0385 17.2925 20.5539 33.5701

Table 63 below shows in mg a weight of each of the first to seventh lenses for each of Examples 1-28 described herein. L1w is a weight of the first lens, L2w is a weight of the second lens, L3w is a weight of the third lens, L4w is a weight of the fourth lens, L5w is a weight of the fifth lens, L6w is a weight of the sixth lens, and L7w is a weight of the seventh lens.

TABLE 63 Ex- am- ple L1w L2w L3w L4w L5w L6w L7w 1  9.7837 7.4278  8.1958 12.2672 17.8114 19.4706 50.3082 2  6.8437 7.4062  9.7075  8.2964 12.2454 15.7048 20.6351 3  8.3391 9.9453 12.0065 10.5160 12.5139 20.8995 28.3070 4  6.5980 7.2274  9.6996  7.7595  7.1717 12.9205 16.7253 5  5.9539 8.3386 10.4718  9.7099 12.6189 11.5472 28.2371 6  5.4436 6.2232  5.3513  4.3058  7.3623  8.4633 20.4684 7  5.8646 5.0523  8.3435  8.9534 11.4784 14.9196 27.3929 8  5.3849 5.3484 10.3733  6.6328 13.1424 15.5803 21.5602 9  5.3716 5.5136  7.8076  7.3291 15.3129 19.8988 18.6318 10  6.1596 7.2770 11.4094  7.3060 12.7199 19.3490 24.1377 11  6.3367 6.6350  8.5711  7.6996 10.1409 14.6680 24.4148 12  5.4069 8.3179  8.3505  8.3070 21.2326 25.1156 37.5222 13  7.0196 7.5776 11.0624 10.0931 13.9522 25.4643 26.3718 14  3.9640 5.7458  4.2174  5.2656 14.1055 26.7923 17.2272 15  4.4041 6.8103  5.8168  7.8490 11.5868  9.3592 28.4188 16  4.8390 5.7284  6.4804  6.9816 12.6288 12.2097 34.8787 17  2.6139 4.6431  2.8331  9.7995  5.0091 20.0609 22.5103 18  4.4926 3.8434  5.1440  5.3949 10.2143 10.9690 19.9312 19  5.8421 8.2788  8.5580  9.0296 15.6566 13.3273 29.7406 20 11.5738 7.5149  6.0339 11.8614  9.6686 20.8628 38.7989 21  5.2374 7.0007  7.4705  9.7477 13.1074 22.5603 17.8857 22  5.1582 8.4469  9.0278 10.3661  8.9465 19.5905 20.5363 23  5.7048 4.8949  5.0767  4.8804 12.3560 25.4196 35.6851 24  5.7664 6.3156  4.7007  7.0690 10.2210 15.5030 23.3392 25  3.9624 4.8894  4.0843  7.6119  7.8166 13.5561 33.1329 26  4.9418 5.3696  6.7144  5.2752 12.3343 38.3453 47.9448 27  5.8524 6.0873  5.3480  5.2823 11.5158 32.8465 48.3872 28  7.8200 7.4175 15.4506 11.2981 21.6156 21.3761 34.9129

Table 64 below shows in mm an overall outer diameter (including a rib) of each of the first to seventh lenses for each of Examples 1-28 described herein. L1TR is an overall outer diameter of the first lens, L2TR is an overall outer diameter of the second lens, L3TR is an overall outer diameter of the third lens, L4TR is an overall outer diameter of the fourth lens, LSTR is an overall outer diameter of the fifth lens, L6TR is an overall outer diameter of the sixth lens, and L7TR is an overall outer diameter of the seventh lens.

TABLE 64 Example L1TR L2TR L3TR L4TR L5TR L6TR L7TR  1 4.930 5.130 5.630 6.230 7.200 7.600 7.800  2 2.270 2.390 2.520 2.750 3.020 3.210 3.320  3 2.440 2.540 2.690 2.900 3.190 3.440 3.620  4 2.290 2.400 2.540 2.630 2.780 2.910 3.040  5 2.460 2.580 2.690 2.800 3.170 3.310 3.470  6 4.220 4.420 4.540 4.720 5.400 5.740 6.300  7 4.210 4.300 4.440 4.840 5.470 6.120 6.900  8 4.250 4.340 4.480 4.880 5.510 6.160 6.480  9 4.190 4.280 4.410 4.810 5.510 6.160 6.520 10 4.430 4.520 4.660 5.060 5.500 6.260 6.580 11 4.430 4.520 4.660 5.060 5.500 6.260 6.570 12 4.470 4.560 4.700 5.030 6.660 7.180 7.430 13 4.730 4.820 4.960 5.290 5.880 6.810 7.060 14 3.510 3.810 4.390 4.980 5.850 6.150 6.250 15 3.930 4.130 4.710 6.170 5.300 6.570 6.670 16 4.030 4.230 4.810 5.400 6.270 6.670 6.770 17 3.830 4.078 4.220 4.980 5.740 6.174 6.510 18 3.930 4.130 4.330 4.930 5.420 5.820 6.020 19 4.630 4.830 5.030 5.830 6.320 6.720 6.920 20 4.830 5.030 5.230 6.030 6.520 6.920 7.120 21 4.250 4.340 4.480 4.880 5.510 6.330 6.700 22 4.290 4.380 4.520 4.920 5.650 6.260 6.770 23 4.090 4.180 4.300 4.530 5.220 6.620 7.320 24 4.110 4.200 4.340 4.612 5.550 6.350 7.210 25 3.730 3.820 3.960 4.390 4.960 6.000 6.860 26 3.970 4.060 4.190 4.630 5.200 7.150 8.020 27 4.390 4.480 4.610 5.040 5.610 7.090 7.950 28 4.870 4.960 5.090 5.520 6.370 7.410 7.840

Table 65 below shows in mm a thickness of a flat portion of the rib of each of the first to seventh lenses for each of Examples 1-28 described herein. L1 rt is a thickness of a flat portion of the rib of the first lens, L2rt is a thickness of a flat portion of the rib of the second lens, L3rt is a thickness of a flat portion of the rib of the third lens, L4rt is a thickness of a flat portion of the rib of the fourth lens, L5rt is a thickness of a flat portion of the rib of the fifth lens, L6rt is a thickness of a flat portion of the rib of the sixth lens, and L7rt is a thickness of a flat portion of the rib of the seventh lens.

TABLE 65 Example L1rt L2rt L3rt L4rt L5rt L6rt L7rt  1 0.580 0.380 0.330 0.300 0.390 0.475 0.920  2 0.590 0.480 0.510 0.270 0.480 0.310 0.410  3 0.600 0.580 0.560 0.470 0.340 0.400 0.470  4 0.540 0.500 0.520 0.420 0.210 0.390 0.400  5 0.390 0.440 0.470 0.360 0.420 0.380 0.470  6 0.435 0.430 0.360 0.215 0.320 0.330 0.405  7 0.550 0.380 0.580 0.410 0.500 0.320 0.530  8 0.490 0.390 0.680 0.360 0.630 0.490 0.480  9 0.520 0.420 0.520 0.410 0.610 0.700 0.370 10 0.490 0.470 0.710 0.470 0.560 0.500 0.550 11 0.560 0.430 0.560 0.510 0.400 0.350 0.550 12 0.490 0.530 0.520 0.370 0.620 0.520 0.690 13 0.600 0.440 0.600 0.460 0.580 0.600 0.440 14 0.482 0.395 0.316 0.328 0.422 0.885 0.409 15 0.431 0.556 0.361 0.429 0.380 0.380 0.667 16 0.431 0.457 0.361 0.364 0.380 0.334 0.729 17 0.326 0.433 0.265 0.472 0.156 0.520 0.641 18 0.440 0.330 0.300 0.260 0.425 0.500 0.518 19 0.540 0.480 0.460 0.250 0.555 0.395 0.688 20 0.620 0.400 0.270 0.430 0.300 0.520 0.760 21 0.480 0.490 0.480 0.500 0.470 0.830 0.320 22 0.480 0.560 0.580 0.470 0.340 0.620 0.440 23 0.510 0.250 0.320 0.320 0.510 0.530 0.720 24 0.510 0.450 0.340 0.430 0.410 0.410 0.420 25 0.400 0.420 0.370 0.500 0.320 0.460 0.720 26 0.470 0.410 0.450 0.410 0.470 0.930 0.700 27 0.440 0.390 0.400 0.400 0.380 0.740 0.720 28 0.560 0.410 0.560 0.540 0.520 0.440 0.540

Table 66 below shows, for each of Examples 1-28 described herein, dimensionless values of each of the ratio L1w/L7w in Conditional Expressions 1 and 7, the ratio S6d/f in Conditional Expressions 2 and 8, the ratio L1TR/L7TR in Conditional Expressions 3 and 9, the ratio L1234TRavg/L7TR in Conditional Expressions 4 and 10, the ratio L12345TRavg/L7TR in Conditional Expressions 5 and 11, and the ratio |f1345674|/f in Conditional Expressions 6 and 12. The dimensionless value of each of these ratios is obtained by dividing two values expressed in a same unit of measurement.

TABLE 66 Example L1w/L7w S6d/f L1TR/L7TR L1234TRavg/L7TR L12345TRavg/L7TR |f134567-f|/f  1 0.1945 1.3016 0.6321 0.703 0.747  0.290  2 0.3317 0.6491 0.6837 0.748 0.780  6.418  3 0.2946 0.6339 0.6740 0.730 0.760  9.970  4 0.3945 0.6228 0.7533 0.811 0.832  8.734  5 0.2109 0.6115 0.7089 0.759 0.790  2.202  6 0.2660 1.1308 0.6698 0.710 0.740  0.357  7 0.2141 1.1111 0.6101 0.645 0.674  7.001  8 0.2498 1.0862 0.6559 0.693 0.724 86.041  9 0.2883 1.1333 0.6426 0.678 0.712 13.864 10 0.2552 1.0140 0.6733 0.709 0.735 17.660 11 0.2595 1.0822 0.6743 0.710 0.736  5.753 12 0.1441 0.9191 0.6016 0.631 0.684  3.475 13 0.2662 1.0795 0.6700 0.701 0.727  2.651 14 0.2301 1.0434 0.5616 0.668 0.721  0.421 15 0.1550 0.9886 0.5892 0.710 0.727  0.302 16 0.1387 0.5953 0.682 0.731  0.028 17 0.1161 1.1439 0.5883 0.657 0.702  0.299 18 0.2254 1.0811 0.6528 0.719 0.755  0.648 19 0.1964 1.2717 0.6691 0.734 0.770  2.161 20 0.2983 1.0829 0.6784 0.742 0.776  0.204 21 0.2928 1.1487 0.6343 0.670 0.700 35.303 22 0.2512 1.0738 0.6337 0.669 0.702  3.201 23 0.1599 1.1208 0.5587 0.584 0.610  0.319 24 0.2471 1.2304 0.5700 0.599 0.633  0.288 25 0.1196 1.0600 0.5437 0.579 0.608  0.301 26 0.1031 1.0935 0.4950 0.525 0.550  0.362 27 0.1209 1.2170 0.5522 0.582 0.607  0.220 28 0.2240 1.1499 0.6212 0.652 0.684  5.885

FIGS. 57 and 58 are cross-sectional views illustrating examples of an optical imaging system and a lens barrel coupled to each other.

The examples of the optical imaging system 100 described in this application may include a self-alignment structure as illustrated in FIGS. 57 and 58 .

In one example illustrated in FIG. 57 , the optical imaging system 100 includes a self-alignment structure in which optical axes of four consecutive lenses 1000, 2000, 3000, and 4000 are aligned with an optical axis of the optical imaging system 100 by coupling the four lenses 1000, 2000, 3000, and 4000 to one another.

The first lens 1000 disposed closest to the object side of the optical imaging system 100 is disposed in contact with an inner surface of a lens barrel 200 to align the optical axis of the first lens 1000 with the optical axis of the optical imaging system 100, the second lens 2000 is coupled to the first lens 1000 to align the optical axis of the second lens 2000 with the optical axis of the optical imaging system 100, the third lens 3000 is coupled to the second lens 2000 to align the optical axis of the third lens 3000 with the optical axis of the optical imaging system 100, and the fourth lens 4000 is coupled to the third lens 3000 to align the optical axis of the fourth lens 4000 with the optical axis of the optical imaging system 100. The second lens 2000 to the fourth lens 4000 may not be disposed in contact with the inner surface of the lens barrel 200.

Although FIG. 57 illustrates that the first lens 1000 to the fourth lens 4000 are coupled to one another, the four consecutive lenses that are coupled to one another may be changed to the second lens 2000 to a fifth lens 5000, or the third lens 3000 to a sixth lens 6000, or the fourth lens 4000 to a seventh lens 7000.

In another example illustrated in FIG. 58 , the optical imaging system 100 includes a self-alignment structure in which optical axes of five consecutive lenses 1000, 2000, 3000, 4000, and 5000 are aligned with an optical axis of the optical imaging system 100 by coupling the five lenses 1000, 2000, 3000, 4000, and 5000 to one another.

The first lens 1000 disposed closest to the object side of the optical imaging system 100 is disposed in contact with an inner surface of the lens barrel 200 to align the optical axis of the first lens 1000 with the optical axis of the optical imaging system 100, the second lens 2000 is coupled to the first lens 1000 to align the optical axis of the second lens 2000 with the optical axis of the optical imaging system 100, the third lens 3000 is coupled to the second lens 2000 to align the optical axis of the third lens 3000 with the optical axis of the optical imaging system 100, the fourth lens 4000 is coupled to the third lens 3000 to align the optical axis of the fourth lens 4000 with the optical axis of the optical imaging system 100, and the fifth lens 5000 is coupled to the fourth lens 4000 to align the optical axis of the fifth lens 5000 with the optical axis of the optical imaging system 100. The second lens 2000 to the fifth lens 5000 may not be disposed in contact with the inner surface of the lens barrel 200.

Although FIG. 58 illustrates that the first lens 1000 to the fifth lens 5000 are coupled to one another, the five consecutive lenses that are coupled to one another may be changed to the second lens 2000 to a sixth lens 6000, or the third lens 3000 to a seventh lens 7000.

FIG. 59 is a cross-sectional view illustrating an example of a seventh lens.

FIG. 59 illustrates the overall outer diameter (L7TR) of the seventh lens, the thickness (L7rt) of the flat portion of the rib of the seventh lens, the thickness (L7edgeT) of the edge of the seventh lens, the thickness (Yc71P1) of the seventh lens at the first inflection point on the object-side surface of the seventh lens, the thickness (Yc71P2) of the seventh lens at the second inflection point on the object-side surface of the seventh lens, and the thickness (Yc72P1) of the seventh lens at the first inflection point on the image-side surface of the seventh lens. Although not illustrated in FIG. 59 , the seventh lens may also have a second inflection point on the image-side surface of the seventh lens, and a thickness of the seventh lens at this inflection point is Yc72P2 as listed in Table 60.

FIG. 60 is a cross-sectional view illustrating an example of a shape of a rib of a lens.

The examples of the optical imaging system 100 described in this application may include a structure for preventing a flare phenomenon and reflection.

For example, the ribs of the first to seventh lenses 1000, 2000, 3000, 4000, 5000, 6000, and 7000 of the optical imaging system may be partially surface-treated to make the surface of the rib rough as illustrated in FIG. 60 . Methods of surface treatment may include chemical etching, physical grinding, or any other surface treatment method capable of increasing a roughness of a surface.

A surface-treated area EA may be formed in an entire area from an edge of the optical portion of the lens through which light actually passes to an outer end of the rib. However, as illustrated in FIG. 60 , non-treated areas NEA including step portions E11, E21, and E22 may not be surface-treated, or may be surface-treated to have a roughness less than a roughness of the surface-treated area EA. The step portions E11, E21, and E22 are portions where the thickness of the rib abruptly changes. A width G1 of a first non-treated area NEA formed on an object-side surface of the lens and including a first step portion E11 may be different from a width G2 of a second non-treated area NEA formed on an image-side surface of the lens and including a second step portion E21 and a third step portion E22. In the example illustrated in FIG. 60 , G1 is greater than G2.

The width G1 of the first non-treated area NEA includes the first step portion E11, the second step portion E21, and the third step portion E22 when viewed in an optical axis direction, and the width G2 of the second non-treated area NEA includes the second step portion E21 and the third step portion E22 but not the first step portion E11 when viewed in the optical axis direction. A distance G4 from the outer end of the rib to the second step portion E21 is smaller than a distance G3 from the outer end of the rib to the first step portion E11. Also, a distance G5 from the outer end of the rib to the third step portion E22 is smaller than the distance G3 from the outer end of the rib to the first step portion E11.

The positions at which the non-treated areas NEA and the step portions E11, E21, and E22 are formed as described above may be advantageous for measuring a concentricity of the lens.

The examples described above enable the optical imaging system to be miniaturized and aberrations to be easily corrected.

While this disclosure includes specific examples, it will be apparent after an understanding of the disclosure of this application that various changes in form and details may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only, and not for purposes of limitation. Descriptions of features or aspects in each example are to be considered as being applicable to similar features or aspects in other examples. Suitable results may be achieved if the described techniques are performed in a different order, and/or if components in a described system, architecture, device, or circuit are combined in a different manner, and/or replaced or supplemented by other components or their equivalents. Therefore, the scope of the disclosure is defined not by the detailed description, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are to be construed as being included in the disclosure. 

What is claimed is:
 1. An optical imaging system comprising: a first lens comprising positive refractive power and a concave image-side surface; a second lens comprising negative refractive power; a third lens comprising a refractive power; a fourth lens comprising a concave image-side surface; a fifth lens comprising a refractive power; a sixth lens comprising a refractive power; and a seventh lens comprising a refractive power, wherein the first to seventh lenses are disposed in order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane, wherein a radius of curvature of an object-side surface of the fourth lens is greater than a radius of curvature of an object-side surface of the second lens, and wherein a radius of curvature of the object-side surface of the second lens is greater than a radius of curvature of an object-side surface of the sixth lens.
 2. The optical imaging system of claim 1, wherein 0.01<R1/R4<1.3, where R1 is a radius of curvature of an object-side surface of the first lens and R4 is a radius of curvature of an image-side surface of the second lens.
 3. The optical imaging system of claim 1, wherein 0.4<D13/D57<1.2, where D13 is a distance from an object-side surface of the first lens to an image-side surface of the third lens and D57 is a distance from an object-side surface of the fifth lens to an image-side surface of the seventh lens.
 4. The optical imaging system of claim 1, wherein 0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*f<0.8, where f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, and f is an overall focal length of the optical imaging system.
 5. The optical imaging system of claim 1, wherein 0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*TTL<1.0, where f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, and TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging plane.
 6. The optical imaging system of claim 1, wherein 0.6<TTL/(2*(IMG HT))<0.9, where and TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging plane and IMG HT is one-half of a diagonal length of the imaging plane.
 7. The optical imaging system of claim 1, wherein 0.2<ΣSD/ΣTD<0.7, where ΣSD is a sum of air gaps along the optical axis between the first to seventh lenses, and ΣTD is a sum of thicknesses along the optical axis of the first to seventh lenses.
 8. The optical imaging system of claim 1, wherein 0<min(f1:f3)/max(f4:f7)<0.4, where min(f1:f3) is a minimum value of absolute values of focal lengths of the first to third lenses and max(f4:f7) is a maximum value of absolute values of focal lengths of the fourth to seventh lenses.
 9. The optical imaging system of claim 1, wherein 0.4<(ΣTD)/TTL<0.7, where ΣTD is a sum of thicknesses along the optical axis of the first to seventh lenses and TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging plane.
 10. An optical imaging system comprising: a first lens comprising positive refractive power and a concave image-side surface; a second lens comprising negative refractive power; a third lens comprising a refractive power; a fourth lens comprising a refractive power; a fifth lens comprising a refractive power; a sixth lens comprising a refractive power; and a seventh lens comprising a refractive power, wherein the first to seventh lenses are disposed in order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane, wherein a radius of curvature of an image-side surface of the fifth lens is greater than a radius of curvature of an image-side surface of the third lens, and wherein a distance from an image-side surface of the fourth lens to an object-side surface of the fifth lens is greater than a thickness along an optical axis of the second lens.
 11. The optical imaging system of claim 10, wherein 0.01<R1/R4<1.3, where R1 is a radius of curvature of an object-side surface of the first lens and R4 is a radius of curvature of an image-side surface of the second lens.
 12. The optical imaging system of claim 10, wherein 0.4<D13/D57<1.2, where D13 is a distance from an object-side surface of the first lens to an image-side surface of the third lens and D57 is a distance from an object-side surface of the fifth lens to an image-side surface of the seventh lens.
 13. The optical imaging system of claim 10, wherein 0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*f<0.8, where f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, and f is an overall focal length of the optical imaging system.
 14. The optical imaging system of claim 10, wherein 0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*TTL<1.0, where f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, and TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging plane.
 15. The optical imaging system of claim 10, wherein 0.6<TTL/(2*(IMG HT))<0.9, where and TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging plane and IMG HT is one-half of a diagonal length of the imaging plane.
 16. The optical imaging system of claim 10, wherein 0.2<ΣSD/ΣTD<0.7, where ΣSD is a sum of air gaps along the optical axis between the first to seventh lenses, and ΣTD is a sum of thicknesses along the optical axis of the first to seventh lenses.
 17. The optical imaging system of claim 10, wherein 0<min(f1:f3)/max(f4:f7)<0.4, where min(f1:f3) is a minimum value of absolute values of focal lengths of the first to third lenses and max(f4:f7) is a maximum value of absolute values of focal lengths of the fourth to seventh lenses.
 18. The optical imaging system of claim 10, wherein 0.4<(ΣTD)/TTL<0.7, where ΣTD is a sum of thicknesses along the optical axis of the first to seventh lenses and TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging plane. 